I think it is important to review grammar and mechanic concepts in English class. I use this once a week, to help reinforce certain common grammar points in the English language. I have them copy the rule and the example in to their journals, then they have to come up with 3 more examples on their own. I have students come up to the board and write out their sentences. Sometimes this activity takes all of 10 minutes, and sometimes it leads into discussions that can take up half the class. It is up to you how you use this. It is on a PowerPoint, and completely editable. I mix this up with other types of bell-work such as journal writing, and literary passages depending upon what we are discussing at the time. If you have any questions, or suggestions, I'd be happy to hear about them! Thanks!