Hosler, Melanie and Tokash, Tara. "United States Symbols STEM Challenge". OER Commons. Institute for the Study of Knowledge Management in Education, 28 Feb. 2019. Web. 28 Dec. 2024. <https://oercommons.org/authoring/52445-united-states-symbols-stem-challenge>.
Hosler, M., & Tokash, T. (2019, February 28). United States Symbols STEM Challenge. OER Commons. Retrieved December 28, 2024, from https://oercommons.org/authoring/52445-united-states-symbols-stem-challenge.