This document provides guidance on writing effective thesis statements. It explains that thesis statements present a clear claim and the grounds or reasons supporting that claim. A good thesis statement takes a debatable position, can be adequately supported within the scope of the assignment, and indicates how the claim will be proven. The document offers examples of strong thesis statements that state a specific claim and the reasons for it, as well as examples of weak thesis statements that are too general or simply restate the topic rather than taking a position. Words to avoid in thesis statements are also highlighted.