I use this Presentation with my 6th graders encouraging them to use Topic Sentences. This presentation includes:
Definition of Topic Sentences
9 Paragraphs - Student or Teacher reads aloud to class; Students must find the Topic Sentence in the paragraph. I let them work together and guess. They must prove why they chose the sentence that they did. The next slide discloses the answer. (One of the paragraphs splits the class every time - that's because there is a topic and summary sentence. Perfect time to introduce the "summary sentence"!
5 Paragraphs without Topic Sentences that they must come up with their own.