Explain to the students that a paragraph is made up of a topic sentence, followed by one to three sentences that support its point and a conclusion sentence.
Hand out paragraph examples with short paragraphs on topics that interest the student's age level. Ask them to read the paragraphs and talk about the topic sentence, the points being made and the conclusion.
Point out how the supporting sentences reinforce the main topic and point that preceded it.
Give the students worksheets that have paragraphs with one sentence missing. Ask them to read the paragraph and fill in the missing sentence. Encourage correct grammar and sentence structure.
Assign the students a paragraph to construct. Ask them to write a short, three to five sentence, paragraph about something that interests them. Each paragraph needs a topic, supporting points and a conclusion.