Richard Lesh
Publications
Lesh, R. A., & Lehrer, R. (2003). Models and modeling perspectives on the development of students and teachers. Mathematical Thinking and Learning, 5(2), 109–129. doi:10.1207/S15327833MTL0502&3_01
Heller, P. M., Post, T. R., Behr, M. J., & Lesh, R. A. (1990). Qualitative and numerical reasoning about fractions and rates by seventh- and eighth-grade students. Journal for Research in Mathematics Education, 21(5), 388–402.
Lesh, Richard, and [[Judith Zawojewski|Judith Zawojewski]. "Problem solving and modeling." Second handbook of research on mathematics teaching and learning 2 (2007): 763-804.