Master teacher Michael Serra knows students love to spot errors. What's Wrong with This Picture? uses this enthusiasm to exercise the basic skills of geometry and visual thinking, perfect as warm-up exercises, homework, or group activities.
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, and improves their mastery and retention of the material.