Borodkin, Emily, Katelyn Martin, Kellie Roy, and Emily Stapleton. “Unleashing the Inner Math Monster: Counting and Cardinality in Kindergarten”. Ohio Journal of School Mathematics 81, no. 1 (June 2, 2019). Accessed May 2, 2024. https://ohiomathjournal.org/index.php/OJSM/article/view/6768.