I have used this lesson with 8th, 9th and 10th grade students, as well as with English Language Learners. I have used it to initially teach commas, semicolons and colons, as well as for review. Each punctuation lesson can be used separately, if desired. Following each "Now, you try it" is an answer key to check understanding and reteach a concept, if necessary. I have had a great deal of success with this lesson, even with adults.