Letter writing is a very engaging and authentic way to learn formatting, punctuation and grammar. The activities in this unit should be learned in tandem with actual letter writing to aunts, uncles or other special far-away people. That way, students can learn and practice the letter writing skills and then apply them in their own letters. It would be especially rich to include their thoughts about books they are reading.
Mix-ups of "there," "they're," and "their" happen way too often. There is no better time than now to help your students get their homophones down. They're sure to have fun with this interactive English lesson!