This study explored how mathematics diary, cooperative learning, and mathematical discussion would affect ninth grade students' math learning attitude. Lasting for about three months (2004/03/01 this 2004/05/29), the study collected and analyzed relevant data while conducting action research. It used systems thinking and peer scaffolding as the theoretical base. We observed the change of student's attitude toward math and probed the factors causing the change. The findings of the study will help teachers reflect on their teaching and develop competence in math instruction. Conclusions based on the results of this indicate that systems thinking increase the quality of the teacher's curriculum/instruction planning and competence of math instruction. Further, instructional strategies such as mathematics diary, cooperative and interactive learning, and mathematical discussion based on systems thinking highly motivated students learning in terms of their attention, participation, interaction, confidence, satisfaction, relevance, and higher order thinking on math learning.