Learning time (minutes per week) - <Mathematics>

Learning time (minutes per week) - <test language>

Learning time (minutes per week) - <science>

Learning time (minutes per week) - in total

Subjective well-being: Sense of Belonging to School (WLE)

Student Atttidudes, Preferences and Self-related beliefs: Achieving motivation (WLE)

Collaboration and teamwork dispositions: Enjoy cooperation (WLE)

Collaboration and teamwork dispositions: Value cooperation (WLE)

Number of changes in educational biography (Sum)

Number of learning domains with additional instruction

Total hours of additional instruction (Sum)

Number of science disciplines and subjects  with additional instruction (Sum)

Comparison science school lessons and additional instruction support (Mean)

Comparison science school lessons and additional instruction structuredness lessons (Mean)

Comparison science school lessons and additional instruction structuredness content (Mean)

Comparison science school lessons and additional instruction teacher-student relation

Comparison mathematics school lessons and additional instruction support (Mean)

Comparison mathematics school lessons and additional instruction structuredness lessons (Mean)

Comparison mathematics school lessons and additional instruction structuredness content (Mean)

Comparison mathematics school lessons and additional instruction teacher-student relation

Students’ Perceived ICT Competence (WLE)

Students’ Perceived Autonomy related to ICT Use (WLE)

Students’ ICT as a topic in Social Interaction (WLE)

Parental current support for learning at home (WLE)

School policies for parental involvement (WLE)

Parents concerns regarding environmental topics (WLE)

Parents’ view on future environmental topics (WLE)

Index highest parental education in years of schooling

Country of Birth National Categories- Father

African country with Portuguese as the official language
Another State of the Gulf Cooperation Council (ARE)
Another country within the European Union (ITA)
A Sub-Saharan country (Africa excl. Maghreb)
Another province in mainland China (QCH)
Hong Kong, Macau, Taiwan (Chinese Taipei)
Province or municipality in which test is being taken (China)
A European country that is not a member of the European Union
An Eastern European country outside the EU
Another country within the European Union (MLT)