Cho, Hoyun, Nasriah Morrison, Emily Ying Liao, Paul Morrill, and Christina Constantinou. “Insights of Digital Mathematics Textbooks; Basic Triangle Properties Through Geometer’s Sketchpad; Discovering Blackbeard’s Treasure by SMART Board; Programming Probability; GeoGebra in the Geometry Classroom”. Journal of Mathematics Education at Teachers College 2, no. 2 (December 9, 2011). Accessed July 5, 2022.