This study was developed in the scope of the Poly-Universe in Teacher Training Education project and explores how to promote interdisciplinary and STEAM approaches in teacher education with Poly-Universe, a game based on materials of different geometric shapes and different colours, that obey certain characteristics that allow for various…

In this article the authors described their exploration of a particular design element they labeled "video in the middle." As part of the video in the middle design, the viewing of carefully selected video clips from teachers' classrooms is sandwiched between pre- and postviewing activities that are expected to support teachers'…

These proceedings are a written record of the research presented at the 42nd annual meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (PME-NA) held in Mazatlán, Mexico, virtually beginning May 27, 2021 and in-person June 2-6, 2021. The conference was originally scheduled to take place…

This study examined the effectiveness of 3 curriculum interventions focused on strengthening children's ability to solve area measurement problems and explored the instructional perspectives of the instructor who implemented the interventions. The interventions involved various degrees of emphasis on area measurement and knowledge of 2-dimensional…