3.1 The two experimental schools E1 and E2 were exposed to STAD, CL.
3.2 Participating teachers in experimental schools were trained for one week.
3.3 The teaching guide contained the general STAD, CL procedures, elements of cooperative learning, team scores computation procedures, group and individual rewards, breakdown of subtopics in scale drawing, teachers` and learners` activities, resources and references.
3.4 Teachers in the experimental schools used past mathematics performance record to constitute heterogeneous teams of five to six members.
3.5 The steps of STAD CL strategy instructional activities included : Lesson presentation; Team study, where students worked on worksheets in their teams to master the material; Evaluation, where students took individual quizzes.
Team recognition where team scores were computed on the basis of team members’ improvement scores. The results were displayed on school bulletin board every week and at the end of the topic certificates were awarded to the high scoring teams.
3.7 The goal structure required that all group members attain at least 70% in the
quizzes and the joint reward ensured positive interdependence.