The research aimed to study The impact of teaching using the Six Thinking Hats strategy in the development of some scientific concepts In science among students in the third grade in accordance with the basic variables of sex and teaching strategy. Research was conducted on a sample of third grade primary students in the city of Damascus during the first semester of the academic year 2014/2015. Sample number of students has reached 50 students, distributors evenly to a control group and an experimental group. The Researcher followed experimental method and used scientific concepts development test.The results showed superiority of the experimental group students on the students in the control group posttest scientific concepts development test, And that there are no statistically significant differences between the mean scores of students in the experimental group (males , females) and the mean scores of students in the control group (male , female) in the dimensional application of the test , due to the variable sex.