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Sharing Teaching Ideas
Sharing Teaching Ideas: Why Is the square root of 25 Not ±5?

David Roach, David Gibson, Keith Weber 

January 2004, Volume 97, Issue 1, Page 12

Abstract:
The value/s of the square root of a positive integer. How students may incorrectly acquire the belief that the square root of 25 is plus or minus 5 and describes teaching methods to be used to convince students their belief is incorrect. Includes graphs to show how the misconceptions occur.

Keywords:
Article
Conceptual Development
Communication
Grades 9-12
Teacher
Professional Development / Teacher Education
Integers