Like PISA, the PISA-D teacher questionnaire asks about school leadership at the school where they work and job satisfaction. The system-level questionnaire used in PISA was adapted for use by PISA-D countries, and both versions capture data on the structure of national programmes, national assessments and examinations, instructional time, teacher training and salaries, educational finance (including enrolment), national accounts and population data (UIS, 2016). Some background variables are also collected about the person who answers the "person most knowledgeable about the youth" questionnaire. While PISA offers an optional parent questionnaire, it is distributed to the parents of students sitting the PISA test in school and focuses on the parents' perceptions of and involvement in their child's school, their support for learning at home and school choice; and it acquires information on basic characteristics of the early childhood education and care arrangements of PISA participants, and reasons for attending or not attending early childhood education and care. The Foundations for Success include four family factors: nutrition, no exposure to toxins, the mother's physical health and the mother's emotional health.