T. Dreyfus, C. Rasmussen, N. Apkarian, and M. Tabach. INDRUM 2018, (2018)"The complexity of knowledge flow in the classroom, even based on this one class session, is far greater than one might imagine. ".
T. Nachlieli, Y. Mor, E. Gil, and Y. Kashtan. Eleventh Congress of the European Society for Research in Mathematics Education, 22, Utrecht, Freudenthal Group; Freudenthal Institute; ERME, (2019)