Abstract-The study investigates the effects of thinking on thinking skills (TS) and control groups among 68 standard five Malaysian students at two primary schools. The quasi-experimental design method was employed through TS and control groups. The findings revealed that there were significant differences in post-test scores between these two groups on total scores of the creative thinking, fluency, flexibility advantage for TS group but originality and the scores of thinking performance of science task were no significant. Thus, the study implies that educators, should use thinking skills-based instructional strategy to enhance the levels of creativity and learning among primary schools' students.Index Terms-Creative thinking, critical thinking, science, thinking skills strategy (TS), test of creative thinking (TCT), science task of thinking (STT)