In this study, it was aimed to analyse the effects of instructional curriculum based on cooperative learning for the 7th grade Science and Technology lesson unit of “Structure and Properties of Matter” on students’ motivation toward science learning. results showed that while there were significant difference between mean scores of experimental group before and after instruction, there were no significant difference between mean scores of control group. This reflected that Cooperative Learning Instructional Curriculum was highly effective on increasing students’ motivation toward science learning when compared to the existing Science and Technology Curriculum.