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.

Contributor Notes

Dana C. Cox,, is a former middle school mathematics teacher. She currently teaches prospective elementary and secondary teachers at Miami University in Oxford, Ohio. She is interested in helping students become proportional thinkers.

Michael Todd Edwards,, is co-director of the Geo-Gebra Institute of Ohio and co-editor of the Midwest GeoGebra Journal ( His professional interests focus on the use of technology in the teaching and learning of school mathematics, with particular emphasis on dynamic mathematics software. The authors would like to acknowledge Jane-Jane Lo, Michelle Cirillo, and Jeff Jewell for their support throughout the writing process.

(Corresponding author is Cox
(Corresponding author is Edwards
Mathematics Teaching in the Middle School
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