Collection of 28 mathematics problems across PK–12 grades, encouraging submissions and classroom use.
Problems to Ponder provides 28 varying, classroom-ready mathematics problems that collectively span PK–12, arranged in the order of the grade level. Answers to the problems are available online. Individuals are encouraged to submit a problem or a collection of problems directly to mtlt@nctm.org . If published, the authors of problems will be acknowledged.
No takes yet. Share an insight, caveat, or question.
Lu et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: