Teaches math mastery skills in a fun interactive activity. Zip contains a K-2 and 3-5 version of the activity. See the preview file for the 3-5 version. Students select a level and then are given a set amount of time to answer all the questions in that level. All questions are randomly generated, so students can use the activity to achieve master in addition, subtraction, division and multiplication. Students are shown the problems they missed with the correct answer at the end of each level they complete.