Abstract
The activity in this study includes forming an egg tangram and various figures from the tangram pieces. In the egg tangram activity, first of all the egg tangram is obtained by using a compass, a ruler and the properties of circle. In this process written and verbal expressions of the drawings are required. Then, students are asked to form several meaningful figures from the egg tangram pieces. The activity is prepared for improving students’ spatial ability, providing their use of their mathematical communication skills, developing their psychomotor skills and helping teachers and students in the applications on subject of circle. The students are enabled to be active physically and mentally in the activity with the teacher’s guidance. The teacher can benefit from teacher guidelines throughout the activity and can make the activity steps easier to do with various cues when the student faces difficulty.

Key words: Egg tangram, circle, spatial ability, communication skill