I recently touched up an old handout, and would welcome feedback.
How to Write a Thesis Statement
A thesis statement is the single, specific claim that your essay supports. A strong thesis answers the question you want to raise; it does so by presenting a topic, your precise opinion on the topic, and a reasoning blueprint that sketches out the organization for the rest of the paper. A good thesis is not merely a factual statement, an observation, a personal opinion or preference, or the question you plan to answer.