Graber, Kelli. "ND 2nd Grade Math Prioritized Standards Scales". OER Commons. Institute for the Study of Knowledge Management in Education, 15 May 2019. Web. 03 Oct. 2024. <https://oercommons.org/authoring/54312-nd-2nd-grade-math-prioritized-standards-scales>.
Graber, K. (2019, May 15). ND 2nd Grade Math Prioritized Standards Scales. OER Commons. Retrieved October 03, 2024, from https://oercommons.org/authoring/54312-nd-2nd-grade-math-prioritized-standards-scales.