Do you need information about grammatical rules or ideas about how to teach persuasive writing? This site has free information and lesson plans for everything that your students need to know to be successful on Part I and II of the TASC Writing test.
Make sure to explore the Teacher and Tutor Resources. If your objective is TASC readiness, I suggest looking up lessons and resources for the high and medium emphasis standards identified in the TASC Fact Sheet for Writing.
Note: Research tells us that grammar instruction is most effective when done in context and not in isolation. In other words, doing grammar exercises that are unrelated to the topics you are teaching will not be very impactful. I suggest that you adapt the activities and worksheets so that they are related to the content you are working on.