The document provides guidance on writing a strong thesis statement for an AP U.S. History exam. It explains that a thesis must take a position and make an argument, not just state facts or opinions. A good thesis is specific enough to address the prompt but not so narrow that it can't be supported with evidence. The thesis should typically acknowledge alternative views and show analysis rather than just restating the question. The document also recommends placing the thesis at the end of the introductory paragraph.