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Children's perception of ratios and fractions in Grade 5
Wachsmuth, Ipke ; Behr, Merlyn J. ; Post, Thomas R. ; Hershkowitz, Rina (Ed.)1983Number line representations of fractions
Behr, Merlyn J. ; Bright, George W. ; Wachsmuth, Ipke ; Wagner, Sigrid (Ed.)1982On children's quantitative concept of rational number: construct and estimate the sum
Behr, Merlyn J. ; Wachsmuth, Ipke ; Post, Thomas R. ; Bergeron, Jacques C. (Ed.) ; Herscovic, Nicolas (Ed.)In: Proceedings of the fifth annual meeting: Montréal Sept. 29 - Oct. 1, 1983 = actes de la cinquième rencontre annuelle / PME-NA, North American Chapter of the International Group for the Psychology of Mathematics Education, Vol. vol. 2, page 272-2791983Inconsistent student behavior in applicational situations of mathematics
Wachsmuth, Ipke ; Streefland, Leen (Ed.)In: Proceedings of the Ninth International Conference for the Psychology of Mathematics Education, Vol. vol. 1: Individual contributions, page 362-3681985Turning the plates: size perception of rational numbers among 9- and 10-year old children
Behr, Merlyn J. ; Wachsmuth, Ipke ; Vermandel, Alfred (Ed.)1982