Equivalent fractions: Their difficulty and educational implications

The Child's Conception of Geometry

Jim Richardson, Jean Piaget, Bärbel Inhelder et al. · British Journal of Educational Studies · 1960 · 914 citations

Natural Sciences, Mathematics, Child Development +12

Rational number concepts

Merlyn J. Behr, Richard Lesh, Thomas R. Post et al. · 1983 · 392 citations

Learning Fractions with Understanding: Building on Informal Knowledge

Nancy K. Mack · Journal for Research in Mathematics Education · 1990 · 238 citations

Education, Mathematics, Mathematics Education +9

Schemes of action and operation involving composite units

Leslie P. Steffe · Learning and Individual Differences · 1992 · 227 citations

Engineering, Systems Engineering, Complex Systems +4

Identification of Multiplicative Thinking in Children in Grades 1–5

Faye B. Clark, Constance Kamii · Journal for Research in Mathematics Education · 1996 · 157 citations

Education, Educational Psychology, Mathematics +11