A thesis statement is a sentence that explains what the main claim of the author is in a text. The thesis statement conveys the main idea of the passage that the author wants to prove. In this example, the thesis statement is best explained in sentence 6. Sentence 6 contains two important claims: first, that modern approaches to learning such as online learning can provide opportunities for students to better reach their potential; and second, that such interventions will require a fundamental rethinking of our educational system.