Cheryl L. Avila and Enrique Ortiz
Introduce students to matrices while they encode, decode, and pass secret messages in math class.
LeAnn E. Neel-Romine, Sara Paul, and Kathryn G. Shafer
While working within the framework of van Hiele levels and handling Play-doh®, students write and critique definitions of a circle.
Dana C. Cox and Michael Todd Edwards
How do middle school students interpret the phrase “two sizes too small”? Examining students’ responses will re-form your thinking about teaching similarity and using nonstandard shapes.
Jae Ki Lee, Kyong Mi Choi, and Melissa McAninch
The L-shaped 2-5-3-7 algorithm, combining efficient Singaporean and Korean procedures with divisibility rules of primes 2, 3, 5, and 7, helps students identify LCMs and GCFs.