Why not try this activity for the first week of school? Not only will it be fun for everyone, but it will also give you an idea of where everyone's at concerning reading and spelling. This is a "no pressure", low prep way to assess the students in this area. Be observant! Whether you have the kids working in pairs or individually, you can walk the room during the activity and make mental notes (or written ones) on how some are excelling and some are struggling a little. Here's a list of "Back to School" words you can use as the "long words":
the name of your school principal
I have similar resources like these in my TpT store. The difference is that my store resources focus on holidays and holiday words. Each word is featured on a task card and comes with a photo, the "long" holiday word, blank tile spaces for various sized words, and a self-checking list of words on the back of the card.
If you'd like to see these, here are the links: