This document outlines the key elements of an effective paragraph: a topic sentence that introduces the main idea, 3 supporting sentences that provide details and examples to explain the main idea, and a concluding sentence that restates the main idea. An example 5-sentence paragraph is provided to illustrate these elements, with the first sentence introducing the topic of why Canada is one of the best countries, the next 3 sentences giving reasons and supporting the main idea, and the last sentence concluding by restating this point.