Pinterest and am so excited about it! I love the new pop of color it added to the room and I know the kids are going to love it too! Each letter has a book ring on a hook and all new words are added behind the letter (in alphabetical order). The book rings let us add and change words as often as we like and kids can take the letter's ring to their desk to use the word in their writing.
If you'd like to try this and like the letters I used - I'm happy to share! I printed them four on a sheet and laminated them before hanging.