Making Sense of Fractions, Ratios, and Proportions2002
(Classroom activities for making sense of fractions, ratios, and proportions)
2002 Yearbook (Yearbook (National Council of Teachers of Mathematics).) (Yearbook (National Council of Teachers of Mathematics).)
by Bonnie H. Litwiller
Excellent resource for mathematics educators that emphasizes the importance of understanding fractions, ratios, and proportions as early as elementary school. Also provides classroom challenges.
— from OpenLibrary
5 editions at OpenLibrary