id	keyword
ajmri-4320	grade
ajmri-4320	teaching
ajmri-4320	multi
ajmri-4320	teachers
ajmri-4320	performance
ajmri-4320	students
ajmri-4320	practice
ajmri-4320	multigrade
ajmri-4320	years
ajmri-4320	table
ajmri-4320	mean