id	keyword
edu-1020	problems
edu-1020	teachers
edu-1020	routine
edu-1020	non
edu-1020	mathematics
edu-1020	school
edu-1020	education
edu-1020	high
edu-1020	types
edu-1020	questions
edu-1020	journal
edu-1020	data
edu-1020	students
edu-1020	research
edu-1020	use