This has become a staple in our classroom. I make a big poster of the word family, digraph, blend or whatever we are working on for the week. We come up with a few words together and then the students can write other words on post-its that they know or they can look for new words with the same pattern in the books they read at read to self. We add the new words to the list throughout the week.
Since we were working on r blends here are some other r blend activities: