Expected completed levels <ISCED level 2
Expected completed levels <ISCED level 3B or C
Expected completed levels <ISCED level 3A
Expected completed levels <ISCED level 4
Expected completed levels <ISCED level 5B
Expected completed levels <ISCED level 5A or 6
Country of Birth National Categories- Father
Country of Birth National Categories- Mother
Country of Birth National Categories- Self
Grade compared to modal grade in country
Father White collar/Blue collar classification
Mother White collar/Blue collar classification
Highest parent White collar/Blue collar classification
Learning time (minutes per week) - Test Language
Learning time (minutes per week) - Mathematics
Learning time (minutes per week) - Science
Index of economic, social and cultural status (WLE)
Teachers Stimulation of Reading Engagement
Use of structuring and scaffolding strategies
Reading for School: Interpretation of literary texts
Reading for School: Non-continuous materials
Reading for School: Traditional literature courses
Reading for School: Functional reading materials
Country weight factor for equal weights (1000)