This is a Powerpoint presentation with 10 problems that contain errors. It includes problems from 7th Grade adding/subtracting/multiplying/dividing negatives and positives and order of operations. Students can analyze the work to determine the error.
Here's how I used:
Students wrote in a COMPLETE SENTENCE what was either wrong with the work or the steps to take to get the correct answer. We are really pushing the students to be able to analyze and write. That's the next step in our state testing for math. I broke this down throughout the week and just did a few problems each day. I took up the papers each day, but at the end of the 10 problems, I recorded a 100 in the gradebook for complete sentences, and I could tell they really tried.
Believe it or not, the kids really LOVE doing this.
Some other ways to present to the students.
*problem of the day for 10 days
*review a few each day
*print each slide and give to students
The answer key is on the last slide.
Hope this helps.