Programme for International Student Assessment (PISA)
The Organization for Economic Co-operation and Development (OECD) conducts PISA. It measures the reading and mathematics knowledge of 15-year olds and the data can be used to report to indicator 4.1.1c.
Trends in International Mathematics and Science Study (TIMSS -8th Grade)
TIMMS 8th grade assessment measures mathematics and science knowledge at grade 8. The data can be used to report to indicator 4.1.1c.