ERIC Number: ED184880
Record Type: Non-Journal
Publication Date: 1980-Apr
Reference Count: N/A
A Longitudinal Study of the Effect of Number Size and Presence of Manipulative Materials on Children's Processes in Solving Addition and Subtraction Verbal Problems.
Moser, James M.
Strategies used by 150 children as they solved addition and subtraction verbal problems were studied over a period of one-and-a-half years. Number size and presence of manipulative materials were variables manipulated in individual interviews given at three separate intervals. Two addition and four subtraction tasks were used. Processes changed from primitive counting and modeling behaviors to more sophisticated strategies and use of number facts and heuristics. Presence of manipulatives tended to induce children to use simpler and less efficient processes. When confronted with larger numbers and lack of manipulatives, children used or invented more sophisticated strategies. (Author/MK)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Sponsor: National Inst. of Education (DHEW), Washington, DC.
Authoring Institution: N/A