These are great quizzes to use weekly to encourage mastery and fluency of the basic skills needed in 8th grade math under the Common Core. They are designed to be completed in 10 minutes, so they fit easily into the class period as a warm up. The skill checks get progressively more difficult as they increase in number; mastered skills are replaced with newer skills. The first checks contain primarily 7th grade skills (integers, like terms, order of operations, plotting points, simplifying fractions). Later skill checks add exponent rules, transformations, graphing y=mx+b, scientific notation, rational vs irrational, function vs relation and slope from two points. Twenty skill checks are provided.