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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.

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Peer reviewed Peer reviewed
ERIC Number: EJ668826
Record Type: CIJE
Publication Date: 2000
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: ISSN-1072-0839
Three Balloons for Two Dollars: Developing Proportional Reasoning.
Langrall, Cynthia W.; Swafford, Jane
Mathematics Teaching in the Middle School, v6 n4 p254-61 Dec 2000
Describes how students develop proportional reasoning through problem solving. Identifies the essential components of proportional reasoning and includes recommendations for instruction. (YDS)
Publication Type: Guides - Classroom - Teacher; Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: N/A