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Using geometer's sketchpad for teaching and learning of geo..:

Ng, Dawn Kit Ee ; Teong, Su Kwang
Ng, D. K. E., & Teong, S. K. (2003). Using geometer's sketchpad for teaching and learning of geometry: The case of eighty pre-service teachers. In Research in and on the classroom: ERAS Conference 2003 Proceedings (pp. 272-277). Singapore: Educational Research Association of Singapore..  , 2003