A classic manipulative, used since the 1960s, continues to offer opportunities for intriguing problem solving involving proportions.
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Kyle T. Schultz and Stephen F. Bismarck
A geometric approach using exact square manipulatives can promote an understanding of the algorithm to dismantle radical expressions.
Jessica F. Shumway
Three days of using building blocks significantly enriched second graders' thinking about multiple dimensions.
Lingguo Bu
The relationship between a midpoint and an average showcases the interplay between procedural knowledge and conceptual knowledge in learning mathematics for teaching.
Sarah J. Selmer and Kimberly Floyd
A proactive preschool teacher differentiates instruction by using the Universal Design for Learning framework to decrease barriers that limit students' access to classroom learning.
Jeffrey J. Wanko, Michael Todd Edwards, and Steve Phelps
The Measure-Trace-Algebratize (MTA) approach allows students to uncover algebraic relationships within familiar geometric objects.
Katie L. Anderson
Teachers share success stories and ideas that stimulate thinking about the effective use of technology in K–grade 6 classrooms. This article describes a set of lessons where sixth graders use virtual pattern blocks to develop proportional reasoning. Students' work with the virtual manipulatives reveals a variety of creative solutions and promotes active engagement. The author suggests that technology is most effective when coupled with worthwhile mathematical tasks and rich classroom discussions.
Øistein Gjøvik
An origami activity can lead to rich tasks in several branches of mathematics.
Timothy McKeny and Joanne Caniglia
Students analyze a photograph to solve mathematical questions related to the images captured in the photograph. This month, the art of sculptor and painter Sol LeWitt is analyzed. Counting, combinatorics, and spatial visualization are among the mathematical themes evinced.
Harold Reiter, Arthur Holshouser, and Patrick Vennebush
This method for counting lattice octagons strengthens students' counting skills and geometrical thinking.
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