"MathThematics" is a mathematics curriculum for grades 6 through 8 that combines activity-based, discovery learning with direct instruction. The textbook for each grade level has eight instructional modules, with each module focused on a theme. Open-ended questions and projects are utilized throughout the curriculum to assess problem-solving skills and the ability to communicate mathematically. The What Works Clearinghouse (WWC) identified seven studies of "MathThematics" that were published or released between 1983 and 2008. Of the five studies of "MathThematics" that fall within the scope of the Middle School Math review, none meet WWC evidence standards. The lack of studies meeting WWC evidence standards means that, at this time, the WWC is unable to draw any conclusions based on research about the effectiveness or ineffectiveness of "MathThematics." (Contains 1 footnote.)