Slavin, R. E., & Lake, C. (January 01, 2008). Effective Programs in Elementary Mathematics: A Best-Evidence Synthesis. Review of Educational Research, 78, 3, 427-515.
Behr, M. J., Wachsmuth, I., & Post, T. R. (March 01, 1985). Construct a Sum: A Measure of Children's Understanding of Fraction Size. Journal for Research in Mathematics Education, 16, 2, 120-131.
Cramer, K. A., Monson, D. S., Wyberg, T., Leavitt, S., & Whitney, S. B. (September 01, 2009). Models for Initial Decimal Ideas. Teaching Children Mathematics, 16, 2, 106-117.
Cramer, K. A., Post, T. R., & delMas, R. C. (March 01, 2002). Initial Fraction Learning by Fourth- and Fifth-Grade Students: A Comparison of the Effects of Using Commercial Curricula with the Effects of Using the Rational Number Project Curriculum. Journal for Research in Mathematics Education, 33, 2, 111-144
Lamon, S. J. (1999). Teaching fractions and ratios for understanding: Essential content knowledge and instructional strategies for teachers. Mahwah, N.J: Erlbaum
