This resource houses links to a variety of sample math tasks aligned to the Common Core standard. Sources may include but are not limited to: Illustrative Mathematics, PARCC, Khan Academy, and the Illinois State Board of Education.
Farquer, Tim. "2.OA.4 Sample Tasks". OER Commons. Institute for the Study of Knowledge Management in Education, 27 Dec. 2012. Web. 27 Jan. 2020. <https://www.oercommons.org/authoring/1726-2-oa-4-sample-tasks>.
Farquer, T. (2012, December 27). 2.OA.4 Sample Tasks. OER Commons. Retrieved January 27, 2020, from https://www.oercommons.org/authoring/1726-2-oa-4-sample-tasks.