1.
Pogorelova L, Sheehan-Braine S, John A, Wasserman N. A Problem-based Curriculum to Conceptually Develop the Multiplication Principle for Counting. JMETC [Internet]. 2024 Jun. 25 [cited 2024 Jun. 30];15(1):37-43. Available from: https://journals.library.columbia.edu/index.php/jmetc/article/view/11949