Michael Serra: What's Wrong with This Picture?

Students Look for Errors to Gain Mathematical Understanding

Students love to spot errors. What's Wrong with This Picture? uses this enthusiasm to exercise the basic skills of geometry and visual thinking in new and exciting ways.

This book contains a set of 50 black-line masters that are perfect as warm-up exercises, homework, or group activities.

Please order print books online from Amazon.

MSRP $17.95 60 pages Grades 8–10

Each page has up to four problems:

At least one is worked correctly.
At least one contains an error, an optical illusion, or conflicting information.
Students reason through the problems to determine which are correct and which are not.

Looking out for errors and discussing them as a class:

Deepens students' understanding of the concepts
Improves their powers of observation
Improves their mastery and retention of the material

Effective September 6, 2012, What's Wrong with This Picture is published by Angie and Michael Serra dba Playing It Smart and is no longer associated with Key Curriculum Press.