Özet:

This research has been conducted in order to examine the teaching materials used in the instruction of geometry sub-learning fields and teaching - learning process as stated in the Turkish Elementary Mathematics (1-5 degrees) Curriculum. Case study, which is one of the qualitative research methods, has been used in this research. The participants of the research include one classroom teacher and 12 students selected via random method out of 40 students from a state primary school. The administration of the research was performed in the fall semester of 2005-2006 academic-year. Data were obtained through video recordings, interview and written documents. The results indicated that the teacher used only over - head projector as a technological teaching material, and did not provide other appropriate materials for teaching the subjects and lesson during instruction. Instead, the teacher used teaching tools and materials from the classroom environment that he/she thought as suitable. It has also been seen that the teacher used few and insufficient concrete materials in the activities within the class. The fact that the teacher did not use sufficient teaching and instructional materials affected the learning processes of the students in a negative way

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