Despite the fact that the newly developed mathematics curriculum has several strengths, it has some weaknesses, as claimed by teachers, as well. According to them, the in-service training given before pilot testing was not adequate to make understand the vision and mission of whole curriculum, and philosophy underlying. They believe that the activities suggested are not applicable in crowded classrooms. The infrastructure facilities of schools were not sufficient for the realization of the activities suggested. They complained that no books prepared in line with new mathematics curriculum provided for the teachers. In addition, they believed that they left alone with new curriculum without any supports. At the end, the teachers were required to provide suggestions based upon their experiences with new curriculum for the other teachers who would implement the new curriculum next years. They suggested for their colleagues to consider some issues in relation to time, evaluation procedures, visual materials, group working and activities. They suggested that the teachers be careful about the time devoted both for instruction and evaluation processes. They added that the lessons should be enhanced with visual and technological equipments to get attention and curiosity. The group work activities should be encouraged so that interaction among the students can be ensured. In addition, they suggested that the teachers seek for new materials that can be easily found, and for play (game) activities relevant to students’ development level.