Many mathematicians take an Occam’s-razor point of view: Unless there’s a compelling reason why a number should be rational, it probably is not. After all, mathematicians have long known that most ...

An animated journey into the world of rational numbers! A fraction thief disrupts a number town, leading to a fun exploration of fractions, natural numbers, and mathematical concepts.

Erno Lehtinen, Kaarina Merenluoto, Eero Kasanen, Conceptual change in mathematics: From rational to (un)real numbers, European Journal of Psychology of Education, Vol. 12, No. 2, SPECIAL ISSUE: ...

Article citations More>> Behr, M., Harel, G., Post, T., & Lesh, R. (1992). Rational number. ratio and proportion. In D. Grouws (Ed.), Handbook of research on mathematics teaching and learning. New ...

Merlyn J. Behr, Helen A. Khoury, Guershon Harel, Thomas Post, Richard Lesh, Conceptual Units Analysis of Preservice Elementary School Teachers' Strategies on a Rational-Number-as-Operator Task, ...