- The Role of Research
- The Nature of the Research Literature
- Research Findings By Chapter and Section
- References

**Behr, M.**, Lesh, R., Post, T., Silver, E. (1983). Rational number concepts. In R. Lesh & M. Lindau (Eds.),. Acquisition of mathematical concepts and processes. (pp. 91-126). New York: Academic Press.**Behr, M.**, Wachsmuth, I., Post, T., Lesh, R. (1984). Order and equivalence of rational numbers: A clinical teaching experiment. Journal for Research in Mathematics Education,. 15, 323-341.- Heller, P., Ahlgren, A., Post, T.,
**Behr, M.**, Lesh, R. (1989). Proportional reasoning: The effect of two context variables, rate type, and problem setting. Journal of Research in Science Teaching. 26, 205-220. - Hiebert, J., Behr, M. (Eds.) (1988). Number concepts and operations in the middle grades. Reston, VA: National Council of Teachers of Mathematics.

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