

“Is that a proof?”: Using video to teach and learn how to prove at the university levelRaman, M., Sandefur, J., Birky, G., Campbell, C., & Somers, K. . "“Is that a proof?”: Using video to teach and learn how to prove at the university level." Proof and proving in mathematics education: ICMI Study 19 conference proceedings. Taipei, Taiwan: National Taiwan Normal University, 2009. 

