1. Arzarello, F., Paola, D., Robutti, O., & Sabena, C. (2009). Gestures as semiotic resources in the mathematics classroom. Educational Studies in Mathematics, 70(2), 97–109.
2. Berland, L., & Hammer, D. (2012). Framing for scientific argumentation. Journal of Research in Science Teaching, 49(1), 68–94.
3. Bhagat, K., Chang, C.-N., & Chang, C.-Y. (2016). The impact of the flipped classroom on mathematics concept learning in high school. Educational Technology and Society, 19(3), 134–142.
4. Borba, M., Askar, P., Engelbrecht, J., Gadanidis, G., Llinares, S., & Aguilar, M. (2016). Blended learning, e-learning and mobile learning in mathematics education. ZDM, 48(5), 589–610.
5. Boston Globe, The (2011, August 12). Math instruction goes viral. (
http://www.boston.com/bostonglobe/editorial_opinion/editorials/articles/2011/08/12/math_instruction_goes_viral/
.)