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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

Learn more about the history of ERIC here. PDF icon

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Ding, Meixia; Li, Xiaobao; Capraro, Mary Margaret; Kulm, Gerald – Investigations in Mathematics Learning, 2012
This study qualitatively explored teachers' responses to doubling errors (e.g., 3/4 x 2 = 6/8) that typically reflect students' difficulties in understanding the "rule" for finding equivalent fractions (e.g., 3/4 x 2/2 = 6/8). Although all teachers claimed to teach for understanding in interviews, their responses varied in terms of effectiveness…
Descriptors: Mathematics, Mathematics Instruction, Teaching Methods, Mathematics Teachers
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Ding, Meixia; Heaton, Ruth; Hartman, David – Investigations in Mathematics Learning, 2012
This study took a broad view of generalization, exploring how classroom instruction within opportunities of implicit generalization may be related to students' abilities to generalize. From an integrated perspective of generalization and problem solving, we investigated twelve lessons of two middle level teachers based on three pattern-based…
Descriptors: Generalization, Problem Solving, Algebra, Grade 6