Adjudicated sub-region
82610 = United Kingdom: England, Wales & Northern Ireland
05699 = Belgium: French & German regions (not adjudicated)

OECD country
0 = Non-OECD
1 = OECD

Grade Q1
96 = Ungraded
99 = Missing

Study programme Q2
99 = Missing

Gender Q4
1 = Female
2 = Male
9 = Missing

Mother ISCO code Q5a
1000 = LEGISLATORS, SENIOR OFFICIALS & MANAGERS
5000 = SERVICE WORKERS & SHOP & MARKET SALES WORKERS
2100 = PHYSICAL, MATHEMATICAL & ENGINEERING SCIENCE PROFESSIONALS
3100 = PHYSICAL & ENGINEERING SCIENCE ASSOCIATE PROFESSIONALS
4100 = OFFICE CLERKS [Incl. Clerk nfs, Government Office Clerk nfs]
6100 = MARKET-ORIENTED SKILLED AGRICULTURAL & FISHERY WORKERS
3200 = LIFE SCIENCE & HEALTH ASSOCIATE PROFESSIONALS
4200 = CUSTOMER SERVICES CLERKS [incl. Customer Service Clerk nfs]
6200 = SUBSISTENCE AGRICULTURAL & FISHERY WORKERS
7300 = PRECISION, HANDICRAFT, PRINTING ETC TRADES WORKERS
9300 = LABOURERS IN MINING, CONSTRUCTION, MANUFACTURING & TRANSPORT
2400 = OTHER PROFESSIONALS [incl. Professional nfs, Admin. Professional]
8400 = SEMI-SKILLED WORKERS NFS [Incl. Production Process Worker nfs]
1110 = LEGISLATORS [incl. Member of Parliament, Member of Local Council]
2110 = PHYSICISTS, CHEMISTS & RELATED PROFESSIONALS
3110 = PHYSICAL & ENGINEERING SCIENCE TECHNICIANS
7110 = MINERS, SHOTFIRERS, STONE CUTTERS & CARVERS
8110 = MINING- & MINERAL-PROCESSING PLANT OPERATORS
1210 = [LARGE ENTERPRISES] DIRECTORS & CHIEF EXECUTIVES
3210 = LIFE SCIENCE TECHNICIANS ETC ASSOCIATE PROFESSIONALS
5210 = FASHION & OTHER MODELS [incl. Mannequin, Artists Model]
6210 = SUBSISTENCE AGRICULTURAL & FISHERY WORKERS
7210 = METAL MOULDERS, WELDERS, SHEETMETAL WORKERS STRUCTURAL METAL
8210 = METAL- & MINERAL-PRODUCTS MACHINE OPERATORS
1310 = [SMALL ENTERPRISE] GENERAL MANAGERS [incl. Businessman, Trader]
2310 = HIGHER EDUCATION TEACHING PROFESSIONALS [incl. Univ. Professor]
3310 = PRIMARY EDUCATION TEACHING ASSOCIATE PROFESSIONALS
7310 = PRECISION WORKERS IN METAL ETC MATERIALS
1120 = SENIOR GOVERNMENT OFFICIALS [incl. Minister, Ambassador]
5120 = HOUSEKEEPING & RESTAURANT SERVICES WORKERS
6120 = MARKET-ORIENTED ANIMAL PRODUCERS ETC WORKERS
9120 = STREET SERVICES ELEMENTARY OCCUPATIONS [incl. Billposter]
1220 = [LARGE ENTERPRISE OPERATION] DEPARTMENT MANAGERS
3220 = MODERN HEALTH ASSOCIATE PROFESSIONALS EXCEPT NURSING
7220 = BLACKSMITHS, TOOL-MAKERS ETC TRADES WORKERS
3320 = PRE-PRIMARY EDUCATION TEACHING ASSOCIATE PROFESSIONALS
7320 = POTTERS, GLASS-MAKERS ETC TRADES WORKERS
8320 = MOTOR-VEHICLE DRIVERS [incl. Driver nfs]
3420 = BUSINESS SERVICES AGENTS AND TRADE BROKERS
7420 = WOOD TREATERS, CABINET-MAKERS ETC TRADES WORKERS
7520 = [SKILLED WORKERS NFS] [incl. Craftsman, Artisan, Tradesman]
3130 = OPTICAL & ELECTRONIC EQUIPMENT OPERATORS
9130 = DOMESTIC ETC HELPERS CLEANERS & LAUNDERERS
1230 = [LARGE ENTERPRISES] OTHER DEPARTMENT MANAGERS
2230 = NURSING & MIDWIFERY PROFESS. [incl. Registered Nurses, Midwives]
3230 = NURSING & MIDWIFERY ASSOCIATE PROFESSIONALS
8230 = RUBBER- & PLASTIC-PRODUCTS MACHINE OPERATORS
2330 = PRIMARY & PRE-PRIMARY EDUCATION TEACHING PROFESSIONALS
3330 = SPECIAL EDUCATION TEACHING ASSOCIATE PROFESSIONALS
7330 = HANDICRAFT WORKERS IN WOOD,TEXTILE, LEATHER ETC
8330 = AGRICULTURAL & OTHER MOBILE PLANT OPERATORS
2430 = ARCHIVISTS, LIBRARIANS ETC INFORMATION PROFESSIONALS
3140 = SHIP & AIRCRAFT CONTROLLERS & TECHNICIANS
7140 = PAINTERS, BUILDING STRUCTURE CLEANERS ETC TRADES WORKERS
9140 = BUILDING CARETAKERS, WINDOW ETC CLEANERS
1240 = OFFICE MANAGERS [incl. Clerical Supervisor]
3240 = TRADITIONAL MEDICINE PRACTITIONERS & FAITH HEALERS
7240 = ELECTRICAL & ELECTRONIC EQUIPMENT MECHANICS & FITTERS
2340 = SPECIAL EDUC. TEACHING PROFESSIONALS [incl. Remedial, Blind]
8340 = SHIPS DECK CREWS ETC WORKERS [incl. Boatman, Deck Hand, Sailor]
3440 = CUSTOMS, TAX ETC GOVERNMENT ASSOCIATE PROFESSIONALS
7440 = PELT, LEATHER & SHOEMAKING TRADES WORKERS
9150 = MESSENGERS, PORTERS, DOORKEEPERS ETC WORKERS
8250 = PRINTING-, BINDING- & PAPER-PRODUCTS MACHINE OPERATORS
2450 = WRITERS & CREATIVE OR PERFORMING ARTISTS
8260 = TEXTILE-, FUR- & LEATHER-PRODUCTS MACHINE OPERATORS
3470 = ARTISTIC, ENTERTAINMENT & SPORTS ASSOCIATE PROFESSIONALS
3480 = RELIGIOUS ASSOCIATE PROFESS. [incl. Evangelist, Lay Preacher]
4190 = OTHER OFFICE CLERKS [incl. Office Boy, Photocopy Machine Op.]
7111 = Miners & quarry workers [incl. Miner nfs]
2211 = Biologists, botanists zoologists etc professionals
3211 = Life science technicians [incl. Medical Laboratory Assistant]
4211 = Cashiers & ticket clerks [incl. Bank/Store, Toll Collector]
8211 = Machine-tool operators [incl. Machine Operator nfs]
9211 = Farm-hands & labourers [incl. Cowherd, Farm Helper, Fruit Picker]
1311 = [Small enterprise] General managers agr., forestry & fishing
7311 = Precision-instr. makers & repairers [incl. Dental, Watch Maker]
7411 = Butchers, fishmongers etc food preparers
3121 = Computer assistants [incl. Assistant Users Services]
4121 = Accounting & bookkeeping clerks [incl. Payroll Clerk]
1221 = Production dep. managers agriculture & fishing
7221 = Blacksmiths, hammer-smiths & forging press workers
8221 = Pharmaceutical- & toiletry-products machine operators
2321 = [Sec. teachers, academic track] [incl. Middle School Teacher]
7321 = Abrasive wheel formers, potters etc workers
9321 = Assembling labourers [incl. Sorter, Bottle Sorter, Winder]
7421 = Wood treaters [incl. Wood Grader, Wood Impregnator]
2131 = Computer systems designers & analysts [incl. Software Engineer]
3131 = Photographers & electronic equipment operators
4131 = Stock clerks [incl. Weighing Clerk, Storehouse Clerk]
5131 = Child-care workers [incl. Nursemaid, Governess]
8131 = Glass & ceramics kiln etc machine operators
9131 = Domestic helpers & cleaners [incl. Housemaid, Housekeeper nfs]
1231 = Finance & admin. department managers [incl. Company Secretary]
3231 = Nursing associate professionals [incl. Trainee Nurses]
7231 = Motor vehicle mechanics & fitters [incl. Bicycle Repairman]
7331 = Handicraft workers in wood etc materials
8331 = Motorised farm & forestry plant operators [incl. Tractor Driver]
9331 = Hand or pedal vehicle drivers [incl. Rickshaw Driver]
3431 = Administrative secretaries etc associate professionals
2141 = Architects town & traffic planners [incl. Landscape Architect]
5141 = Hairdressers, barbers, beauticians etc workers
6141 = Forestry workers & loggers [incl. Rafter, Timber Cruiser]
7141 = Painters etc workers [incl. Construction Painter, Paperhanger]
9141 = Building caretakers [incl. Janitor, Sexton, Verger]
3241 = Traditional medicine practitioners [incl. Herbalist]
7241 = Electrical mechanics & fitters [incl. Office Machine Repairman]
8151 = Crushing- grinding- & chemical-mixing machinery operators
9151 = Messengers, package & luggage porters & deliverers
1251 = Higher military officers [Captain and above]
2351 = Education methods specialists [incl. Curricula Developer]
2451 = Authors journalists & other writers [incl. Editor, Techn. Writer]
8261 = Fibre-preparing-, spinning- & winding machine operators
8281 = Mechanical-machinery assemblers [incl. Car Assembly Line Worker]
4112 = Word-processor etc operators [incl. Teletypist]
5112 = Transport conductors [incl. Train Conductor]
9112 = Street vendors non-food products [incl. Hawker, Pedlar]
2212 = Pharmacologists, pathologists etc profess. [incl. Biochemist]
4212 = Tellers & other counter clerks [incl. Bank Teller, Post Office]
7212 = Welders & flamecutters [incl. Brazier, Solderer]
8212 = Cement & other mineral products machine operators
1312 = [Small enterprise] General managers manufacturing
9312 = Construction & maintenance labourers: roads dams etc
2412 = Personnel & careers profess. [incl. Job Analyst, Stud. Couns.]
3412 = Insurance representatives [incl. Insurance Agent, Underwriter]
7412 = Bakers, pastry-cooks & confectionery makers
4122 = Statistical & finance clerks [incl. Credit Clerk]
6122 = Poultry producers [incl. Chicken Farmer, Skilled Hatchery Worker]
7122 = Bricklayers & stonemasons [incl. Paviour]
8122 = Metal melters, casters & rolling-mill operators
1222 = Production dep. managers manufacturing [incl. Factory Manager]
4222 = Receptionists & information clerks [incl. Medical Receptionist]
7222 = Tool-makers etc workers [incl. Locksmith]
8222 = Ammunition- & explosive-products machine operators
2322 = [Sec. teachers, vocational track] [incl. Vocational Instructor]
7322 = Glass-makers, cutters, grinders & finishers
8322 = Car, taxi & van drivers [incl. Taxi Owner nfs]
9322 = Handpackers & other manufacturing labourers [incl. Crater]
7422 = Cabinet-makers etc workers [incl. Cartwright, Cooper]
3132 = Broadcasting & telecommunications equipment operators
4132 = Production clerks [incl. Planning Clerks]
5132 = Inst.-based personal care workers [incl. Ambulance, Orderly]
7132 = Floor layers & tile setters [incl. Parquetry Worker]
9132 = Helpers & cleaners in establishments [Kitchen Hand, Chambermaid]
1232 = Personnel & industrial relations department managers
3232 = Midwifery associate professionals [incl. Trainee Midwife]
2332 = Pre-primary educ. teaching professionals [incl. Kindergarten]
7332 = Handicraft workers in textile leather etc materials
8332 = Earth-moving- etc plant operators [incl. Bulldozer Driver]
9332 = Drivers of animal-drawn vehicles & machinery
3432 = Legal etc business associate profess. [incl. Bailiff, Law Clerk]
2142 = Civil engineers [incl. Construction Engineer]
3142 = Ships deck officers & pilots [incl. River Boat Captain]
5142 = Companions & valets [incl. Personal Maid]
7142 = Varnishers etc painters [incl. Automobile Painter]
1252 = Lower grade commissioned officers [incl. Army Lieutenant]
3452 = [Armed forces non-commissioned officers] [incl. Sergeant]
5162 = Police officers [Incl. Policeman, Constable, Marshall]
8162 = Steam-engine & boiler operators [incl. Stoker]
9162 = Sweepers etc labourers [incl. Odd-Job Worker]
9503 = Social beneficiary (unemployed, retired, sickness, etc.)
4113 = Data entry operators [incl. Key Puncher]
6113 = Gardeners, horticultural & nursery growers
7113 = Stone splitters, cutters & carvers [incl. Tombstone Carver]
9113 = Door-to-door & tel. salespersons [incl. Solicitor, Canvasser]
7213 = Sheet-metal workers [incl. Panel Beater, Coppersmith, Tinsmith]
1313 = [Small enterprise] General managers constr. [incl. Contractor]
7313 = Jewellery & precious-metal workers [incl. Goldsmith]
9313 = Building construction labourers [incl. Handyman, Hod Carrier]
3413 = [Real] estate agents [incl. Real Estate Broker]
6123 = Apiarists & sericulturists [incl. Beekeeper, Silkworm Raiser]
7123 = Concrete placers, concrete finishers etc workers
4223 = Telephone switchboard operators [incl. Telephone Operator]
7223 = Machine-tool setters & setter-operators [Metal driller, Turner]
8223 = Metal finishing- plating- & coating-machine operators
3133 = Medical equipment operators [incl. X-ray Technician]
4133 = Transport clerks [incl. Dispatcher, Expeditor]
5133 = Home based personal care workers [incl. Attendant]
7233 = [Industrial & agricultural] machinery mechanics & fitters
9333 = Freight handlers [incl. Docker, Loader, Longshoreman, Remover]
7433 = Tailors, dressmakers & hatters [incl. Milliner]
3143 = Aircraft pilots etc associate professionals
5143 = Undertakers & embalmers [incl. Funeral Director]
7143 = Building structure cleaners [incl. Chimney Sweep, Sandblaster]
2443 = Philosophers, historians & political scientists
6153 = Deep-sea fishery workers [incl. Fisherman nfs, Trawler Crewman]
9153 = Vending-machine money collectors, meter readers etc workers
8163 = Incinerator water-treatment etc plant operators
3473 = Street night-club etc musicians, singers & dancers
2114 = Geologists & geophysicists [incl. Geodesist]
3114 = Electronics & telecommunications engineering technicians
4114 = Calculating-machine operators [incl. Bookkeeping Machine Op.]
6114 = Mixed-crop growers [Incl. Share Cropper]
1314 = [Small enterprise] General managers wholesale & retail trade
1224 = Production dep. managers wholesale & retail trade
3224 = Optometrists & opticians [incl. Dispensing Optician]
7224 = Metal wheel-grinders, polishers & tool sharpeners
7424 = Basketry weavers, brush makers etc workers [incl. Broom Maker]
1234 = Advertising & public relations department managers
7234 = [Unskilled garage worker] [incl. Oiler-Greaser]
3434 = Statistical, mathematical etc associate professionals
4144 = Scribes etc workers [incl. Form Filling Assistance Clerk]
7244 = Telegraph & telephone installers & servicers
7344 = Photographic etc workers [incl. Darkroom worker]
5164 = [Armed forces, soldiers] [incl. Enlisted Man]
8264 = Bleaching-, dyeing- & cleaning-machine operators
8274 = Baked-goods cereal & chocolate-products machine operators
3474 = Clowns, magicians, acrobats etc associate professionals
8284 = Metal-, rubber- & plastic-products assemblers
9505 = Vague(a good job, a quiet job, a well paid job, an office job)
1315 = [Small enterprise] General managers restaurants & hotels
3415 = Technical & commercial sales representatives
1225 = Production dep. managers restaurants & hotels
3225 = Dental assistants [incl. Oral Hygienist]
1235 = Supply & distribution department managers
7435 = Textile, leather etc pattern-makers & cutters
7245 = Electrical line installers, repairers & cable jointers
8275 = Fruit-, vegetable- & nut-processing-machine operators
3475 = Athletes, sports persons etc associate professionals
1316 = [Small enterprise] General managers transp., storage & comm.
7416 = Tobacco preparers & tobacco products makers
1226 = Production dep. managers transp., storage & communic. ]
7136 = Plumbers & pipe fitters [incl. Well Digger]
2446 = Social work professionals [incl. Welfare Worker]
8286 = Paperboard, textile etc products assemblers
1317 = [Small enterprise] General managers business services
3417 = Appraisers, valuers & auctioneers [incl. Claims Adjuster]
1227 = Production dep. managers business services [incl. Bank Manager]
3227 = Veterinary assistants [incl. Veterinarian Vaccinater]
1237 = Research & development department managers
2147 = Mining engineers, metallurgists etc professionals
8277 = Tea-, coffee- & cocoa-processing-machine operators
1318 = [Small enterprise] General managers personal care, cleaning etc.
1228 = Production dep. managers personal care, cleaning etc
8278 = Brewers- wine & other beverage machine operators
3119 = Physical & engineering science technicians nec
1319 = [Small enterprise] General managers nec [incl. Travel, Fitness]
2419 = Business profess. [incl. Publicity/Patent agent, Market Research]
3419 = Finance & sales associate professionals nec
6129 = Market-oriented animal producers etc workers nec
7129 = Building frame etc trades workers nec [incl. Scaffolder]
1229 = Production dep. managers nec [incl. Dean,School Principal]
3229 = Modern health associate professionals except nursing nec
2429 = Legal professionals nec [incl. Notary, Notary Public]
3429 = Business services agents & trade brokers nec
3139 = Optical & electronic equipment operators nec
5139 = [Other] care etc workers nec [incl. Animal Feeder]
3439 = Administrative associate profess. nec [incl. Management Ass.]
2149 = Architects engineers etc professionals nec [incl. Consultant]
5149 = Other personal services workers [incl. Escort, Dancing Partner]
3449 = Customs tax etc government associate professionals nec
5169 = Protective services workers [incl. Bodyguard, Coastguard]
8269 = Textile-, fur- & leather-products machine operators nec

Mother <highest schooling> Q6
1 = Completed ISCED 3A
2 = Completed ISCED 3B, 3C
3 = Completed ISCED 2
4 = Completed ISCED 1
5 = Did not complete ISCED 1
7 = N/A
8 = Invalid
9 = Missing

Mother <ISCED 5A or 6> Q7a
1 = Yes
2 = No
7 = N/A
8 = Invalid
9 = Missing

Self born in country Q11a
1 = Country of test
2 = Other Country
7 = N/A
8 = Invalid
9 = Missing

Country arrival age Q11b
97 = N/A
98 = Invalid
99 = Missing

Language at home Q12
1 = Language of test
2 = Other national language
3 = Other language
7 = N/A
8 = Invalid
9 = Missing

Possessions <country-specific item 1> Q13o
032001 = ARG: Cable TV (Direct TV, Cablevision, etc.)
642001 = ROU: Video Camera / Digital Photo Camera
352001 = ISL: Security Service or Security System
792001 = TUR: Air-Conditioning-type Heating and Cooling System
203001 = CZE: Digital Camera (not part of a mobile phone)
528001 = NLD: Digital Camera (not part of mobile phone or laptop computer)
032002 = ARG: No Cable TV (Direct TV, Cablevision, etc.)
642002 = ROU: No Video Camera / Digital Photo Camera
352002 = ISL: No Security Service or Security System
792002 = TUR: No Air-Conditioning-type Heating and Cooling System
203002 = CZE: No Digital Camera (not part of a mobile phone)
616002 = POL: No Cable TV with at least 30 channels
528002 = NLD: No Digital Camera (not part of mobile phone or laptop computer)

Possessions <country-specific item 2> Q13p
440001 = LTU: Press Subscription Edition (newspaper, magazine)
250001 = FRA: Digital Camera (not part of a mobile phone)
792001 = TUR: Treadmill (fitness equipment device)
703001 = SVK: Digital Camera (not part of mobile phone)
344001 = HKG: Musical Instrument (e.g. piano, violin)
554001 = NZL: Digital Camera (not part of mobile phone)
440002 = LTU: No Press Subscription Edition (newspaper, magazine)
250002 = FRA: No Digital Camera (not part of a mobile phone)
372002 = IRL: No Bedroom with an En-suite Bathroom
792002 = TUR: No Treadmill (fitness equipment device)
703002 = SVK: No Digital Camera (not part of mobile phone)
124002 = CAN: No Subscription to a Daily Newspaper
724002 = ESP: No Satellite Dish or Digital TV Set
344002 = HKG: No Musical Instrument (e.g. piano, violin)
554002 = NZL: No Digital Camera (not part of mobile phone)

Possessions <country-specific item 3> Q13q
620001 = PRT: Central Heating or Air Conditioning Equipment
372001 = IRL: Premium Cable TV Package (e.g. Sky Movies, Sky Sports)
246001 = FIN: Fitness Equipment (e.g. exercise bike, rowing machine)
417001 = KGZ: Imported Clothes Washing Machine such as Ariston or Indesit
348001 = HUN: Digital Camera (not part of a mobile phone)
620002 = PRT: No Central Heating or Air Conditioning Equipment
372002 = IRL: No Premium Cable TV Package (e.g. Sky Movies, Sky Sports)
246002 = FIN: No Fitness Equipment (e.g. exercise bike, rowing machine)
417002 = KGZ: No Imported Clothes Washing Machine such as Ariston or Indesit
348002 = HUN: No Digital Camera (not part of a mobile phone)

How many cell phones Q14a
1 = None
2 = One
3 = Two
4 = Three or more
7 = N/A
8 = Invalid
9 = Missing

How many books at home Q15
1 = 0-10 books
2 = 11-25 books
3 = 26-100 books
4 = 101-200 books
5 = 201-500 books
6 = More than 500 books
7 = N/A
8 = Invalid
9 = Missing

Sci enjoyment - Have fun Q16a
1 = Strongly agree
2 = Agree
3 = Disagree
4 = Strongly disagree
7 = N/A
8 = Invalid
9 = Missing

Sci tasks - Newspaper Q17a
1 = Do easily
2 = With some effort
3 = Struggle on own
4 = Couldn't do it
7 = N/A
8 = Invalid
9 = Missing

Sci activity - Science TV Q19a
1 = Very often
2 = Regularly
3 = Sometimes
4 = Hardly ever
7 = N/A
8 = Invalid
9 = Missing

Sci info - Photosynthesis - none Q20a
1 = Tick
2 = No Tick
7 = N/A
8 = Invalid

Sci interest - Physics Q21a
1 = High Interest
2 = Medium Interest
3 = Low Interest
4 = No Interest
7 = N/A
8 = Invalid
9 = Missing

Envr aware - Greenhouse Q22a
1 = Never heard
2 = Know a little
3 = Know something
4 = Familiar
7 = N/A
8 = Invalid
9 = Missing

Envr issues - Air pollution Q24a
1 = Concern for me
2 = Concern for others
3 = Concern other countries
4 = Not a concern
7 = N/A
8 = Invalid
9 = Missing

Envr improve - Air pollution Q25a
1 = Improve
2 = Stay same
3 = Get worse
7 = N/A
8 = Invalid
9 = Missing

Science know - Job available Q28a
1 = Very well informed
2 = Fairly informed
3 = Not well informed
4 = Not informed at all
7 = N/A
8 = Invalid
9 = Missing

Regular lessons - Science Q31a
1 = No time
2 = Less than 2 hours
3 = 2 up to 4 hours
4 = 4 up to 6 hours
5 = 6 or more hours
7 = N/A
8 = Invalid
9 = Missing

Learning - Student ideas Q34a
1 = All lessons
2 = Most Lessons
3 = Some lessons
4 = Hardly ever
7 = N/A
8 = Invalid
9 = Missing

Self - Do well Science Q36a
1 = Very important
2 = Important
3 = Of little importance
4 = Not important at all
7 = N/A
8 = Invalid
9 = Missing

How long used computers IC2
1 = Less than 1 year
2 = 1 to 3 years
3 = 3 to 5 years
4 = 5 years or more
7 = N/A
8 = Invalid
9 = Missing

Use computer at home IC3a
1 = Almost every day
2 = Once or twice a week
3 = Few times a month
4 = Once a month or less
5 = Never
7 = N/A
8 = Invalid
9 = Missing

How well - Chat IC5a
1 = Do well by myself
2 = Do with help
3 = Know but can't do
7 = N/A
8 = Invalid
9 = Missing

ISCED level
1 = ISCED level 1
2 = ISCED level 2
3 = ISCED level 3
7 = N/A
8 = Invalid
9 = Missing

ISCED designation
1 = A
2 = B
3 = C
4 = M
7 = N/A
8 = Invalid
9 = Missing

ISCED orientation
1 = General
2 = Pre-Vocational
3 = Vocational
7 = N/A
8 = Invalid
9 = Missing

Unique national study programme code
0320010 = ARG: ARTISTIC, GENERAL PROGR. - LOWER SECONDARY YEAR 1-2 (OLD)
2760010 = DEU: LOWER SEC., WITH ACCESS TO UPPER SEC. (KOOP. GS, GYMN.)
3760010 = ISR: HIGHER RELIGIOUS EDUCATION FOR GIRLS YEARS 7-9
0560110 = BEL: SPECIAL SEC. EDUC. - LOWER SEC. (TRAINING FORM 3 / FIRST 3 YEARS)
0569620 = BEL: VOCATIONAL TRAINING FOCUSED ON THE LABOUR MARKET (FR COM ONLY)
3800001 = ITA: LICEO (SC., CLASS., SOC. SC., SCIENT.-TECHNOLOGICAL, LINGUISTIC)
0310001 = AZE: PROGRAMME OF BASIC GENERAL EDUCATION (LOWER SECONDARY)
4420001 = LUX: LOWER SECONDARY EDUCATION (EST: PREPARATOIRE)
6430001 = RUS: PROGRAMME OF BASIC GENERAL EDUCATION (LOWER SECONDARY)
1240001 = CAN: GRADES 7-9 (QUEBEC: SECONDARY 1–3, MANITOBA: SENIOR 1
3440001 = HKG: LOWER SECONDARY IN GRAMMAR OR INT. PROGR.
4460001 = MAC: GRAMMAR OR INTERNATIONAL PROGRAM AT LOWER SECONDARY LEVELS
2760001 = DEU: LOWER SECONDARY WITH ACCESS TO UPPER SECONDARY (COMPREHENSIVE)
4170001 = KGZ: PROGRAMME OF BASIC GENERAL EDUCATION (LOWER SECONDARY)
5280001 = NLD: PRACTICAL PREPARATION FOR LABOUR MARKET
7880001 = TUN: ENSEIGNEMENT DE BASE (LOWER SECONDARY)
8261001 = GBR: STUDYING MOSTLY TOWARD ENTRY LEVEL CERTIFICATES
0560101 = BEL: (FIRST YEAR A OF FIRST STAGE OF) GENERAL EDUCATION
0320011 = ARG: ARTISTIC, GENERAL PROGR. - UPPER SECONDARY (OLD)
7920011 = TUR: SECONDARY AND VOCATIONAL HIGH SCHOOL
3760011 = ISR: HIGHER RELIGIOUS EDUC. FOR GIRLS YEARS 10-12 - WITH MATRICULATION
0560111 = BEL: SPECIAL SEC. EDUC. - UPPER SEC. (TRAINING FORM 3 / YEARS 4 AND 5)
1000002 = BGR: SECONDARY EDUCATION - GENERAL NONSPECIALIZED (UPPER)
2500002 = FRA: SPECIAL LOWER SEC. EDUCATION (SEGPA, CPA)
1700002 = COL: SECONDARY EDUCATION (UPPER), ACADEMICA
0310002 = AZE: PROGRAMME OF SECONDARY GENERAL EDUCATION (UPPER SECONDARY)
0320002 = ARG: GENERAL PROGRAMME WITH 3RD CYCLE - LOWER SECONDARY (NEW)
4420002 = LUX: LOWER SECONDARY EDUCATION (EST: INFERIEUR)
6420002 = ROU: VOCATIONAL EDUCATION (SCUOLA DE ARTE SI MESERII)
7520002 = SWE: UPPER SECONDARY SCHOOL, GENERAL ORIENTATION
2030002 = CZE: 6, 8-YEAR GYMNASIUM AND 8-YEAR CONSERVATORY (LOWER SECONDARY)
6430002 = RUS: PROGRAMME OF SECONDARY GENERAL EDUCATION (UPPER SECONDARY)
1240002 = CAN: GRADES 10-12 (QUEB.: SEC. 4-5, MAN.: SNR 2-4, NEWFNDL.: LEV. 1-3)
3440002 = HKG: UPPER SECONDARY IN GRAMMAR OR INT. PROGR.
7050002 = SVN: VOCATIONAL EDUCATION PROGRAMMES OF SHORT DURATION
0360002 = AUS: LOWER SECONDARY WITH SOME VET SUBJECTS
4460002 = MAC: GRAMMAR OR INTERNATIONAL PROGRAM AT HIGHER SECONDARY LEVELS
7560002 = CHE: PREPARATORY COURSE FOR VOCATIONAL EDUCATION
2760002 = DEU: LOWER SEC., NO ACCESS TO UPPER SECONDARY (HAUPTSCHULE)
4170002 = KGZ: PROGRAMME OF SECONDARY GENERAL EDUCATION (UPPER SECONDARY)
8580002 = URY: LOWER SECONDARY WITH A TECHNOLOGICAL COMPONENT
7880002 = TUN: ENSEIGNEMENT SECONDAIRE (UPPER SECONDARY)
8261002 = GBR: STUDYING MOSTLY TOWARD GCSE OR LEVEL 1 OR 2 QUALIF.
8262002 = GBR: S5-S6 & NAT. QUALIF. AT HIGHER LEV., A-LEV., OR EQUIV. (SCO)
0400012 = AUT: MIDDLE VOCATIONAL SCHOOL (HOME ECONOMICS, HEALTH-SOCIAL SERVICES)
0320012 = ARG: VOCATIONAL PROGR. - TECHNICAL EDUC., LOWER SEC. - .YEAR 1-2 (OLD)
3520012 = ISL: STÚDENTSPRÓF. MATRIC. EXAM. CERT. (ACCESS TO UNIV. STUDIES)
2760012 = DEU: LOWER SEC., NO ACCESS TO UPPER SECONDARY (HAUPTSCHULE INTEGRATED)
0569612 = BEL: FIRST DEGREE OF GENERAL EDUCATION (FR/GER)
0569622 = BEL: SPECIAL SEC. EDUC. (LOWER SEC. - TRAINING FORM 3) (FR COM ONLY)
1000003 = BGR: SECONDARY EDUCATION - VOCATIONAL (UPPER)
3000003 = GRC: (TECHNICAL-VOCATIONAL SCHOOLS) UPPER SECONDARY EDUCATION
2500003 = FRA: UPPER SECONDARY (GENERAL OR TECHN.)
1700003 = COL: SECONDARY EDUCATION (UPPER), TECNICA
3800003 = ITA: VOCATIONAL INSTITUTE, ART INSTITUTE, ART HIGH SCHOOL
0310003 = AZE: PROGRAMME OF INITIAL PROFESSIONAL EDUC. (PROF. SCHOOLS, ETC.)
0320003 = ARG: GENERAL PROGR. - ONLY GBE 3RD CYCLE - LOWER SEC. (NEW)
4420003 = LUX: LOWER SECONDARY EDUCATION (ES: INFERIEUR)
6420003 = ROU: LOWER SECONDARY EDUCATION (LICEU INFERIOR)
1520003 = CHL: SECOND CYCLE OF UPPER SECONDARY EDUCATION, ACADEMIC ORIENTATION
7520003 = SWE: UPPER SECONDARY SCHOOL, VOCATIONAL ORIENTATION
3920003 = JPN: UPPER SECONDARY SCHOOL (VOCATIONAL)
2030003 = CZE: 6, 8-YEAR GYMNASIUM (UPPER SECONDARY)
7030003 = SVK: GENERAL 8-YEAR SECONDARY SCHOOL (YEARS 1-4)
6430003 = RUS: PROGRAMME OF INITIAL PROF. EDUCATION (PROFESSIONAL SCHOOLS, ETC.)
3440003 = HKG: LOWER SECONDARY IN PREVOC. OR TECHN. PROGR.
7640003 = THA: VOCATIONAL CERTIFICATE LEVEL (UPPER SECONDARY LEVEL)
7050003 = SVN: VOCATIONAL EDUCATION PROGRAMMES OF MEDIUM DURATION
4460003 = MAC: TECHNICAL OR PREVOCATIONAL PROGRAM AT LOWER SECONDARY LEVELS
7560003 = CHE: SCHOOL PREPARING FOR THE UNIVERSITY ENTRANCE CERTIFICATE
2760003 = DEU: LOWER SEC., NO ACCESS TO UPPER SECONDARY (REALSCHULE)
3760003 = ISR: 6 YEARS HIGHER EDUCATION YEARS 10-12
4380003 = LIE: SCHOOL PREPARING FOR THE UNIVERSITY ENTRANCE CERTIFICATE
8580003 = URY: VOCATIONAL LOWER SECONDARY (BASIC COURSES)
8261003 = GBR: STUDYING MOSTLY FOR AS OR A LEV. OR NON-VOC. LEV. 3 QUALIF.
8262003 = GBR: S5-S6 & NAT. QUAL. AT INTERMED. OR ACCESS LEVEL, OR EQUIV. (SCO)
0560103 = BEL: SECOND YEAR OF FIRST STAGE - PREPARING FOR VOCATIONAL SEC. EDUC.
0400013 = AUT: MIDDLE VOCATIONAL SCHOOL (AGRICULTURAL, FORESTRY)
0320013 = ARG: VOCATIONAL PROGR. - TECHNICAL EDUC., UPPER SEC. YEAR 3 (OLD)
2760013 = DEU: LOWER SEC., NO ACCESS TO UPPER SECONDARY (REALSCHULE INTEGRATED)
0569613 = BEL: FIRST YEAR B SPECIAL NEEDS (FR/GER)
0569623 = BEL: SPECIAL SEC. EDUC. (UPPER SEC.-TRAINING FORM 3)) (FR. ONLY)
1000004 = BGR: SECONDARY EDUCATION - GENERAL SPECIALIZED (UPPER)
3000004 = GRC: GYMNASIO (LOWER SECONDARY EDUCATION ) EVENING SCHOOL
0400004 = AUT: SPECIAL EDUCATION SCHOOL (LOWER SECONDARY)
4400004 = LTU: SECONDARY EDUCATION (UPPER GYMNASIUM)
2500004 = FRA: UPPER SECONDARY (PROFESSIONAL: CAP, BEP, OTHERS)
0310004 = AZE: PROGRAMME OF SEC. PROF. EDUCATION (TECHNIKUM, COLLEGE, ETC.)
0320004 = ARG: ARTISTIC, EGB AND POLIMODAL - LOWER SECONDARY- 7TH TO 9TH YEAR
4420004 = LUX: A 3-YEAR VOCATIONAL EDUCATION (EST: PROF.)
1520004 = CHL: SECOND CYCLE OF UPPER SECONDARY EDUCATION, TECHNICAL ORIENTATION
7520004 = SWE: UPPER SECONDARY SCHOOL, THE INDIVIDUAL PROGRAMME
7920004 = TUR: HIGH SCHOOL WITH INTENSIVE FOREIGN LANGUAGE TEACHING
7030004 = SVK: GENERAL 8-YEAR SECONDARY SCHOOL (YEARS 5-8)
6430004 = RUS: PROGRAMME OF SECONDARY PROF. EDUCATION (TECHNIKUM, COLLEGE, ETC.)
3440004 = HKG: UPPER SECONDARY IN PREVOC. OR TECHN. PROGR.
4840004 = MEX: GENERAL LOWER SECONDARY BY TELEVISION
0360004 = AUS: UPPER SECONDARY WITH SOME VET SUBJECTS
4460004 = MAC: TECHNICAL OR PREVOCATIONAL PROGRAM AT HIGHER SECONDARY LEVELS
7560004 = CHE: VOCATIONAL BACCALAUREAT, DUAL SYSTEM 3-4 YEARS
2760004 = DEU: LOWER SEC. WITH ACCESS TO UPPER SECONDARY (GYMNASIUM)
4170004 = KGZ: PROGRAMME OF SEC. PROF. EDUCATION (TECHNIKUM, COLLEGES, ETC.)
8580004 = URY: VOCATIONAL LOWER SECONDARY (BASIC PROF. EDUC.)
0560104 = BEL: SECOND YEAR OF FIRST STAGE PREPARING FOR REGULAR SEC. EDUC.
0320014 = ARG: VOCATIONAL PROGR. - TECHNICAL EDUC., UPPER SEC. YEAR 4-6,7 (OLD)
2760014 = DEU: LOWER SEC., NO ACCESS TO UPPER SECONDARY (HAUPTSCHULKLASSE)
0569614 = BEL: 2ND YEAR OF VOCATIONAL EDUCATION (FR/GER)
0569624 = BEL: SPECIAL SEC. EDUC. (LOWER SEC.) (GER. ONLY)
0400005 = AUT: SPECIAL EDUCTION SCHOOL (UPPER SECONDARY)
3800005 = ITA: VOC. TRAINING (VOC. SCHOOLS IN BOLZANO & TRENTO)
0320005 = ARG: ARTISTIC-EGB & POLIMODAL - GENERAL UPPER SEC. - YEAR 1-3 (NEW)
4420005 = LUX: A 4-YEAR VOCATIONAL-TECHNICAL EDUCATION (EST)
2030005 = CZE: VOC/TECH SECONDARY SCHOOL WITH MATURATE
7050005 = SVN: SECONDARY GENERAL EDUCATION - TECHNICAL GYMNASIUMS
7560005 = CHE: VOCATIONAL EDUCATION, DUAL SYSTEM 3-4 YEARS
0560105 = BEL: SECOND & THIRD STAGE REGULAR SECONDARY EDUCATION
0320015 = ARG: ARTISTIC, POLIMODAL - YEAR 1-3 (NEW) GENERAL PROGRAMME
2760015 = DEU: LOWER SEC., NO ACCESS TO UPPER SECONDARY (REALSCHULKLASSE)
0569615 = BEL: COMPLEMENTARY YEAR TO 1ST DEGREE (FR COM ONLY)
6200006 = PRT: LOWER SECUNDARY (SPEC. CURR. 1 YEAR)
0320006 = ARG: GENERAL PROGRAMME - LOWER SEC., CORDOBA, YEAR 1-3 (NEW)
4420006 = LUX: A 4 TO 5-YEAR TECHNICAL EDUCATION (EST)
4840006 = MEX: GENERAL BACCALAUREATE OR UPPER SECONDARY
7050006 = SVN: SECONDARY GENERAL EDUCATION - GENERAL AND CASSICAL GYMNASIUMS
2760006 = DEU: COMPREHENSIVE LOWER SEC. WITH ACCESS TO UPPER SEC. (GESAMTSCHULE)
0560106 = BEL: SECOND & THIRD STAGE TECHNICAL SECONDARY EDUCATION
0320016 = ARG: SEC. YEAR 3-5 WITH ADULT GENERAL PROGR., UPPER SEC. (NEW)
2760016 = DEU: LOWER SECONDARY WITH ACCESS TO UPPER SECONDARY (WALDORF)
0569616 = BEL: SECOND & THIRD DEGREES OF GENERAL EDUCATION (FR/GER)
6200007 = PRT: LOWER SECUNDARY (SPEC. CURR. 2 YEARS)
1910007 = HRV: LOWER QUALIFICATION VOCATIONAL PROGRAMMES
0320007 = ARG: GENERAL PROGRAMME - YEAR 4-6 UPPER SEC., CORDOBA - (NEW)
4420007 = LUX: UPPER SECONDARY EDUCATION (ES: SUPERIEUR)
3520007 = ISL: UPPER SECONDARY LEVEL VOCATIONAL 3-YEAR CERTIFICATE
2030007 = CZE: VOC/TECH SECONDARY SCHOOL WITHOUT MATURATE
7030007 = SVK: TECHNICAL COLLEGE, CLASS WITH A SCHOOL LEAVING EXAMINATION
4840007 = MEX: GENERAL BACCALAUREATE OR UPPER SECONDARY
7560007 = CHE: BASIC VOCATIONAL EDUCATION, DUAL SYSTEM 1-2 YEARS
3760007 = ISR: HIGHER RELIGIOUS EDUCATION FOR BOYS YEARS 7-9
8261007 = GBR: STUDENTS < YEAR 10 (ENG. & WALES) OR < YEAR 11 (NORTH. IRELAND)
0560107 = BEL: SECOND & THIRD STAGE ARTISTIC SECONDARY EDUCATION
0320017 = ARG: POLIMODAL WITH ADULT GENERAL PROGR. - UPPER SECONDARY (NEW)
2760017 = DEU: UPPER SECONDARY LEVEL OF EDUCATION (WALDORF)
0569617 = BEL: 2ND & 3RD DEGREES OF TECHN. OR ART. EDUC. (TRANSITION) (FR/GER)
6200008 = PRT: LOWER SECUNDARY (SPEC. CURR. 3 YEARS)
0320008 = ARG: ARTISTIC / GENERAL PROGR. - LOWER SECONDARY YEAR 1-2 (OLD)
4420008 = LUX: LOWER SECONDARY PRIVATE, NOT SUBSIDIZED
7030008 = SVK: TECHNICAL COLLEGE, CLASS WITHOUT A SCHOOL LEAVING EXAMINATION
4840008 = MEX: GENERAL BACCALAUREATE OR UPPER SECONDARY
2760008 = DEU: LOWER SEC., NO ACCESS TO UPPER SEC. (KOOP. GESAMTSCHULE HS)
3760008 = ISR: HIGHER RELIGIOUS EDUC. FOR BOYS YEARS 10-12 WITHOUT MATRICULATION
0560108 = BEL: SECOND & THIRD STAGE VOCATIONAL SECONDARY EDUCATION
0320018 = ARG: ADULT EDUCATION - GENERAL PROGRAMME UPPER SECONDARY
0569618 = BEL: 2ND & 3RD DEGREES OF TECHN. OR ART. EDUC. (QUALIF.) (FR/GER)
0320009 = ARG: ARTISTIC,GENERAL PROGR. - UPPER SEC. YEAR 3 (OLD)
4420009 = LUX: UPPER SECONDARY PRIVATE, NOT SUBSIDIZED
2030009 = CZE: PRACTICAL SCHOOLS, VOCATIONAL EDUCATION PREDOMINANTLY
4840009 = MEX: TECHNICAL BACCALAUREATE OR TECHNICAL FROM UPPER SECONDARY
2760009 = DEU: LOWER SEC., WITH OR WITHOUT ACCESS TO UPPER SEC. (KOOP. GS, RS)
3760009 = ISR: HIGHER RELIGIOUS EDUCATION FOR BOYS WITH MATRICULATION
0560109 = BEL: PART-TIME VOCATIONAL SEC. EDUC. FOCUSED ON THE LABOUR MARKET
0320019 = ARG: ARTISTIC AND PROFESSIONAL COURSES (INFORMAL EDUC.)
0569619 = BEL: SECOND & THIRD DEGREES OF VOCATIONAL EDUCATION (FR/GER)

Occupational status Mother (SEI)
97 = N/A
99 = Missing

Mother White collar/Blue collar classification
1 = White collar high skilled
2 = White collar low skilled
3 = Blue collar high skilled
4 = Blue collar low skilled
7 = N/A
9 = Missing

Mother science-related career
0 = No or indeterminate
1 = Yes
7 = N/A
9 = Missing

Educational level of mother (ISCED)
0 = None
1 = ISCED 1
2 = ISCED 2
3 = ISCED 3B, C
4 = ISCED 3A, ISCED 4
5 = ISCED 5B
6 = ISCED 5A, 6
7 = N/A
9 = Missing

Country of birth (Mother) 5-digit code
16200 = African country with Portuguese as the official language
36200 = An Eastern European country outside the EU
23800 = A European country that is not a member of the European Union
18911 = One of the other former Yugoslav republics (SRB)
00021 = A Sub-Saharan country (Africa excl. Maghreb)

Immigration status
1 = Native
2 = Second-Generation
3 = First-Generation
7 = N/A
8 = Invalid
9 = Missing

Language at home (3-digit)
610 = Another language officially recognised in Italy
602 = National Minorities languages and Bulgarian dialects (BGR)
622 = Serbian of a yekavian variant or Montenegrin
624 = Another language spoken in a European Union country (ITA)
627 = Other national dialects or languages (ROU)
639 = Languages of other republics in the former Yugoslavia (SVN)

Student information on science-related careers PISA 2006 (WLE)
997 = N/A
999 = Missing

Plausible value in reading
9997 = N/A

Original stratum
70310 = SVK: nitriansky - basic and vocational schools
44610 = MAC: Private-not-in-Net, Grammar-International, Chinese and English
15810 = TAP: Junior parts of comprehensive high schools
38020 = ITA: Region 13 - Tecnici - large schools
70320 = SVK: presovsky - secondary, high, secondary + high schools
38040 = ITA: Region 04 - Professionali - large schools
38050 = ITA: Region 09 - Licei - large schools+ moderately small
38060 = ITA: Region 02 - Professionali - large schools
38080 = ITA: Region 05 - moderately small schools
38090 = ITA: Region 11 - moderately small schools
38001 = ITA: Region 08 - Licei - large schools + moderately small
70301 = SVK: Bratislavsky - basic and vocational schools
44601 = MAC: Gov, Grammar-International, Chinese and Portuguese
38011 = ITA: Region 06 - Tecnici - large schools
70311 = SVK: nitriansky - secondary, high, secondary + high schools
38021 = ITA: Region 13 - Professionali - large schools
70321 = SVK: presovsky - secondary, technical, sec. + techn. colleges
38051 = ITA: Region 09 - Tecnici - large schools+ moderately small
38002 = ITA: Region 08 - Tecnici - large schools + moderately small
70302 = SVK: Bratislavsky - secondary, high, secondary + high schools
38012 = ITA: Region 06 - Professionali - large schools
70312 = SVK: nitriansky - secondary, technical, sec. + techn. colleges
70322 = SVK: kosicky - basic and vocational schools
38052 = ITA: Region 09 - Professionali - large schools+ moderately small
38062 = ITA: Region 02 - Formazione professionale - census
38072 = ITA: Region 99 - Tecnici - large schools
38082 = ITA: Region 06 - moderately small schools
38003 = ITA: Region 08 - Professionali - large schools + moderately small
70303 = SVK: Bratislavsky - secondary, technical, sec. + techn. colleges
70313 = SVK: zilinsky - basic and vocational schools
38023 = ITA: Region 13 - Formazione professionale - large schools
70323 = SVK: kosicky - secondary, high, secondary + high schools
38033 = ITA: Region 01 - Formazione professionale - census
38043 = ITA: Region 99 - Tecnici - large schools
38053 = ITA: Region 09 - Medie - moderately small schools
38073 = ITA: Region 99 - Professionali - large schools
38093 = ITA: Region 13 - moderately small schools
38004 = ITA: Region 08 - Medie - large schools + moderately small
70304 = SVK: trnavsky - basic and vocational schools
38014 = ITA: Region 06 - Formazione professionale - census
70314 = SVK: zilinsky - secondary, high, secondary + high schools
15814 = TAP: Practical and technical / Working and Learning schools
70324 = SVK: kosicky - secondary, technical, sec. + techn. colleges
38044 = ITA: Region 99 - Professionali - large schools
38064 = ITA: Region 10 - Tecnici - large schools
38084 = ITA: Region 07 - moderately small schools
70305 = SVK: trnavsky - secondary, high, secondary + high schools
48405 = MEX: BAJA CALIFORNIA SUR, Lower Secondary
44605 = MAC: Private-In-Net, Grammar-International, English and Chinese
70315 = SVK: zilinsky - secondary, technical, sec. + techn. colleges
38025 = ITA: Region 12 - Tecnici - large schools + moderately small
38035 = ITA: Region 05 - Tecnici - large schools
38055 = ITA: Region 99 - Tecnici - large schools
38065 = ITA: Region 10 - Professionali - large schools
38075 = ITA: Region 02 - moderately small schools
38095 = ITA: Region 99 - moderately small schools
38006 = ITA: Region 07 - Tecnici - large schools
70306 = SVK: trnavsky - secondary, technical, sec. + techn. colleges
48406 = MEX: BAJA CALIFORNIA SUR, Upper Secondary
38016 = ITA: Region 99 - Tecnici - large schools
70316 = SVK: banskobytricky - basic and vocational schools
38026 = ITA: Region 12 - Professionali - large schools + moderately small
38036 = ITA: Region 05 - Professionali - large schools
38046 = ITA: Region 03 - Licei - large schools + moderately small
38056 = ITA: Region 99 - Professionali - large schools
38007 = ITA: Region 07 - Professionali - large schools
70307 = SVK: trenciansky - basic and vocational schools
38017 = ITA: Region 99 - Professionali - large schools
70317 = SVK: banskobytricky - secondary, high, secondary + high schools
38047 = ITA: Region 03 - Tecnici - large schools + moderately small
70308 = SVK: trenciansky - secondary, high, secondary + high schools
70318 = SVK: banskobytricky - secondary, technical, sec. + techn. colleges
38028 = ITA: Region 12 - Formazione professionale - census
38048 = ITA: Region 03 - Professionali - large schools + moderately small
38068 = ITA: Region 11 - Tecnici - large schools
38078 = ITA: Region 04 - moderately small schools
38088 = ITA: Region 10 - moderately small schools
38009 = ITA: Region 07 - Formazione professionale - large schools
70309 = SVK: trenciansky - secondary, technical, sec. + techn. colleges
70319 = SVK: presovsky - - basic and vocational schools
38039 = ITA: Region 04 - Tecnici - large schools
38049 = ITA: Region 03 - Medie - large schools + moderately small
38059 = ITA: Region 02 - Tecnici - large schools
38069 = ITA: Region 11 - Professionali - large schools

Effort A: real
997 = N/A
998 = Invalid
999 = Missing

Deleted science item - Big and Small (Q02)
0 = No credit
1 = Full credit
7 = Not administered
9 = Missing

Deleted science item - The Cheetah (Q01)
11 = Yes, Yes: Full credit
21 = No, Yes: No credit
71 = N/A, Yes: Not administered
81 = Invalid, Yes: No credit
91 = Missing, Yes: No credit
12 = Yes, No: No credit
22 = No, No: No credit
82 = Invalid, No: No credit
92 = Missing, No: No credit
77 = N/A, N/A: Not administered
97 = Missing, N/A: Not administered
18 = Yes, Invalid: No credit
28 = No, Invalid: No credit
88 = Invalid, Invalid: No credit
98 = Missing, Invalid: No credit
19 = Yes, Missing: No credit
29 = No, Missing: No credit
89 = Invalid, Missing: No credit
99 = Missing, Missing: No credit

Deleted science item - The Cheetah (Q02)
1 = No credit
2 = No credit
3 = Full credit
4 = No credit
7 = Not administered
8 = Invalid
9 = Missing