Dr. Marc Husband earned his Ph.D. in 2019 from York University. Marc views his research and teaching as related and reciprocal. He taught elementary mathematics for 20 + years in several roles — elementary school teacher, math coach, professional development instructor for in-service teachers, and seconded faculty instructor for pre-service teachers. Broadly, Marc’s research is situated in the field of mathematics education. More specifically, his classroom-based research investigates how teachers elicit and use student ideas as a resource for learning mathematics in a variety of contexts including: elementary school classrooms, teacher education courses, and professional learning settings. Current and recent projects include: elementary teachers’ conceptions of mental mathematics; the potential for using number talks to promote equity; eliciting and documenting students’ mental math ideas: investigating ways to make math visible and visual.