An essay is typically composed of 5 or 6 paragraphs: an introductory paragraph with a thesis statement outlining the main argument or perspective; 3 or 4 supporting paragraphs each discussing part of the argument; and a concluding paragraph that restates the thesis. A good thesis statement clearly expresses an opinion or perspective about a specific topic, such as stating baseball has declined in popularity due to new interest in more violent sports, or that parental involvement is necessary for better education.