Conclusion
The process of collaboratively working toward the problems solving not only provides a wide range of expertise, but also generates positive working relationships. So, using collaborative research in this study is considered as a very useful educational resource. The planning, interpretation, evaluation, and afterwards the adapted plan can provide useful resources for the improvement of student‟s abilities and skills. This collaborative research suggest that using different teaching and learning resources, appropriate activities and managing individual interventions in math learning centers /classes helps students construct and develop the basic concepts. Also, this study suggests teachers to teach multiplication and division not as separate concepts but jointly. Also, it suggests teachers to use word problems as tools for concept understanding. They should engage their students in solving and explaining their problem solving strategies, and not to get them textbook „to do pages‟. Teachers should look on the textbook as a teaching resource and not as object of instruction.