The effect of 7th grade students on geometric thinking different learning environments designed with on polygons subject

Geometry; students understand the world in which they reside, reasoning, problem solving, it's very important in the development of spatial thinking skills. The Van Hiele levels of geometric thinking five occurred in individuals. Level of education requires students to their gains for education requires the level of they can grasp geometric thinking level. Van Hiele; thinking in students ' grade level proficiency should be at the level of thinking which the makers to involvement in masterminding the latter attack. Expected gains from the high school level students learning more given cause-and-effect relationship is based on the Van Hiele must have a third-level thinking skills. A student who graduated from middle school, then Van Hiele must be third-level history. Literature review examined the Van Hiele level third level is a transition and can pass the third level students interested in the debate about the top-level transition situations. Indeed, 7. class is and therefore the transition level geometry teaching activity at this level. We've been working for this property is carried 7.Level of classes. Third level students' geometric thinking levels so there is a need for well-planned courses, too. At the same time with computer-assisted geometry courses activities supported in less time than the third level students that launches when. The van Hiele levels of geometric thinking is the third level is a well known fact that migration is not easy. Students who pass the level geometry wouldn't understand third, begins to voice you can't, as a result, becomes a self-fulfilling prophecy at a later stage. Therefore students Van Hiele it must be regarded third level transitions, and accordingly should be planned activities. In this context the thesis study grade 7 students in order to the third level for computer-aided designing, implementing, and evaluation of a learning environment. Thesis study two experiments control the last pre-test test has been used semi-empirical approach. In this context, 2015-2016 academic year working in three different branch joined the seventh-grader studying total 65.Two of the three branch experimental group students, formed the control group third branch students. First in the experimental group (Group of computers) computer lab constructivist approach, accompanied by dynamic mathematics software GeoGebra appropriate work leaves, conducted a computer-assisted learning environment courses. Second in the experimental group (Manipulative Group) is accompanied by the traditional classroom environment in leaves the lessons using concrete materials. In the control group without any intervention while lessons are routine in some way. Study to determine the students' geometric thinking levels Usiskin (1982) developed by "Van Hiele Geometric thinking to the test" and the test data from clinical interviews were used to support. In addition, computer-aided geometric thinking levels in the environment the impact of informal observations to reveal. Please fill the data obtained using qualitative and quantitative data analysis methods have been analyzed. Van Hiele level assignments Usiskin (1982) by scoring key developed. Each of the clinical interviews recorded tape recorder, then the data in the computer environment in the form of dialogues between researchers and students post poured descriptive analysis. As a result of the work of each of the three groups is a significant rate of increase in geometric thinking levels, but most of the increase has been seen in the computer group. Based on the results obtained made suggestions.