1. Afzal, A., Clark-Jeavons, A. & Oldknow, A. (2004). How can teaching aids improve the quality of mathematics education. Educational Studies in Mathematics, v56, n2-3, p313-328.
2. Almeqdadi, F. (2000). The Effect of Using the Geometer's Sketchpad (GSP) on Jordanian Students’ Understanding of Geometrical Concepts. Proceedings of the International Conference on Technology in Mathematics Education (pp. 163-169). Lebanon.
3. Budak, S. (2010). The effects of Computer Aided Education about Polygons on 6. Grade Students’Academic Success. Unpublished Master Thesis, Eskişehir Osmangazi University, Institute of Science, Eskişehir.
4. Clements, D.H. (1999). Concrete manipulatives, concrete ideas. Contemporary Issues in Early Childhood 1, 45-60.
5. Garofalo, J.G. & Bell. R.L. (2003). Digital images in mathematics and science instruction: The golden rectangle. School Science and Mathematics, 103, 351-353.