id	keyword
iberica-321	students
iberica-321	iberica
iberica-321	visuals
iberica-321	new
iberica-321	economics
iberica-321	graphs
iberica-321	teachers
iberica-321	learning
iberica-321	language
iberica-321	knowledge
iberica-321	22.qxp
iberica-321	los
iberica-321	meaning
iberica-321	página