This is a self-checking activity in which colored pixels will appear when students enter in the correct answer. This pixel activity uses dropdown list (think multiple choice) where the student selects the correct answer. If their answer is correct, the color of the answer box changes and part of the image will appear. It it is incorrect, nothing happens.There are 19 problems in all. Topics include: Positive/Negative integers, order of operations, proportions, percent problems, unit rate, and are