id	keyword
epaa-1012	achievement
epaa-1012	mathematics
epaa-1012	science
epaa-1012	education
epaa-1012	countries
epaa-1012	school
epaa-1012	science achievement
epaa-1012	university
epaa-1012	time
epaa-1012	student
epaa-1012	economies
epaa-1012	mathematics achievement
epaa-1012	student achievement
epaa-1012	performance
epaa-1012	analysis
epaa-1012	teaching
epaa-1012	year
epaa-1012	teacher
epaa-1012	group
epaa-1012	number
epaa-1012	timss
epaa-1012	international
epaa-1012	policy
epaa-1012	universidad
epaa-1012	variables
epaa-1012	study