These materials are designed to be used as a tool to in-service school personnel who may wish to improve achievement levels on the mathematics objectives as measured by the Michigan Education Assessment Program (MEAP). Four areas of mathematics instruction (fractions, decimals, ratio and proportion, and percent) have been addressed in these materials. These areas were selected because of the low attainment rates exhibited on the 7th and 10th grade MEAP. The materials were prepared to assist teachers whose students are having difficulties in one or more of these areas. The materials include an analysis of the errors students make on MEAP, diagnostic tests, and teaching suggestions. (MP)