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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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What Kinds of Numbers Do Students Assign to Literal Symbols? Aspects of the Transition from Arithmetic to Algebra
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Christou, Konstantinos P.; Vosniadou, Stella – Mathematical Thinking and Learning: An International Journal, 2012
Three experiments used multiple methods--open-ended assessments, multiple-choice questionnaires, and interviews--to investigate the hypothesis that the development of students' understanding of the concept of real variable in algebra may be influenced in fundamental ways by their initial concept of number, which seems to be organized around the…
Descriptors: Numbers, Grade 10, Algebra, Secondary School Students
Bridging the Gap between the Dense and the Discrete: The Number Line and the "Rubber Line" Bridging Analogy
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Vamvakoussi, Xenia; Vosniadou, Stella – Mathematical Thinking and Learning: An International Journal, 2012
In two experiments we explored the instructional value of a cross-domain mapping between "number" and "line" in secondary school students' understanding of density. The first experiment investigated the hypothesis that density would be more accessible to students in a geometrical context (infinitely many points on a straight line segment) compared…
Descriptors: Intervention, Secondary School Students, Numbers, Intervals