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
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.
Professional Development / Teacher Education