In the Spring 2017 issue of the Ohio Journal of School Mathematics, Anne Berger discusses an exciting way to engage our students in conversation and collaboration while developing their procedural fluency and mental math skills. In the article, "Using Number Talks to Build Procedural Fluency through Conceptual Understanding," Berger describes her use of number talks to provide brief, daily opportunities for students to discuss, connect and develop their strategies for solving problems. Here's a video of children engaged in a number talk with a guru of the technique, Jo Boaler. Here's a link to the Spring 2017 Issue of the Ohio Journal of School Mathematics.