REFERENCES
- Behr , M. 1976 . The Effect of Manipulatives in Second Graders Learning Mathematics: , Vol. I , Tallahassee, Fla : Florida State University .
- Khlar , D. and Wallace , J.G. 1970 . The Development of Serial Completion Strategies: An Information Processing Analysis . British Journal of Psychology , 61 ( 2 ) : 243 – 257 .
- Khoury , H.A. and Behr , M. 1982 . Student Performance, Individual Differences and Modes of Representation . Journal for Research in Mathematics Education , 13 : 3 – 15 .
- Resnick , L.B. and Ford , W.W. 1981 . The Psychology of Mathematics for Instruction , New Jersey : Lawrence Erbaum Associates .
- Wickelgren , W.A. 1974 . How to solve problems: Elements of a Theory of Problems and Problem Solving , San Francisco : W.H. Freeman & Co. .