id	keyword
ajlsi-1791	pupils
ajlsi-1791	linear
ajlsi-1791	programming
ajlsi-1791	learning
ajlsi-1791	students
ajlsi-1791	linear programming
ajlsi-1791	mathematics
ajlsi-1791	teaching
ajlsi-1791	teachers
ajlsi-1791	performance
ajlsi-1791	study
ajlsi-1791	education
ajlsi-1791	school
ajlsi-1791	journal
ajlsi-1791	knowledge
ajlsi-1791	zambia
ajlsi-1791	research
ajlsi-1791	problems
ajlsi-1791	secondary
ajlsi-1791	understanding