Every Friday I write a sentence on the board and my students have to help me find the mistakes. We call it Friday Fix-It! I make sure to use the correction marks once they let me know the mistakes I've made (two lines under the letter for a capitalization, etc.) so that if I ever do that in their writing, they know what needs to be fixed. They LOVE to find the mistakes and especially love when I phonetically spell words (HELLO! Welcome to MY life). They write the corrected sentence on the long line of the Password Books on the very last line (Friday).