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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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Using the Cuisenaire Rods to Discover Approximations of Pi.
Peer reviewed Peer reviewed
Urion, David K. – Arithmetic Teacher, 1979
An activity for generating approximations of pi is described. (MK)
Descriptors: Activities, Elementary Education, Elementary School Mathematics, Manipulative Materials
But Why Does C = (pi)d?
Peer reviewed Peer reviewed
Ott, Jack M.; And Others – Arithmetic Teacher, 1983
Children need more than activities to help them see that the relationship expressed in a formula is true. Giving them the underlying principles will contribute to better comprehension, retention, and transfer. (MNS)
Descriptors: Cognitive Processes, Concept Formation, Elementary Secondary Education, Logical Thinking