This article shares ideas for using the calendar date to increase students' mental mathematics and problem-solving skills. Postscript items are designed as rich grab-and-go resources that any teacher could quickly incorporate into his or her classroom repertoire with little effort and maximum impact.

Contributor Notes

Martha Hildebrandt,, teaches undergraduate and graduate mathematics education and mathematics courses at Chatham University in Pittsburgh, Pennsylvania.

Edited by Cathery Yeh,, a graduate student in the School of Education at the University of California, Irvine. Submit your quick game, puzzle, activity, or instructional strategy along with suggestions for how teachers of different grade bands (K–1, 2–3, 4–6) could use your idea. Send submissions of no more than 250 words to this department by accessing See submission guidelines for all departments at

(Corresponding author is Hildebrandt author is
Teaching Children Mathematics


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