Classroom Freebies

Fixing Computation Errors

Tired of students making computation errors and not checking their work carefully?
Here's a FUN and student-centered solution.   Plus, it will help your students develop higher order and critical thinking skills while looking at patterns of errors.   And, you can use it with ALL kinds of computation- addition, subtraction, multiplication, division... even with decimals!

  • Work in pairs. 
  • Write a computation problem with a mistake in it (on purpose!)
  • Switch papers and find your partner's mistake
  • Show the correct way to do the computation and explain the error.
  • Repeat throughout the school year- as a review, practice, or to differentiate computation learning.

The printable directions are available  here (FREE!):

The printable computation errors worksheet  is also FREE!:

Happy (Computation) Teaching!!