Every Monday we sing to the word wall. I wish I had made this up, because it's a great little ditty. I believe I saw it years ago on a word wall video. Anyway, you might try it, and the kids won't know or care if you don't get the tune just right. They won't even care if you're pitchy. They might just remember how to spell some words though. (Sorry I can't show you where the voices are coming from.)
Here's a copy of the words if you were hoping for them. I inserted the word "the" as an example. Happy singing!