See if you can write some words that have 'sh' in. Like yesterday see if you can add the sound buttons to your words. Don't forget 'sh' is a digraph so it only needs one sound button.
Shell is quite a tricky word - it has 5 letters but it will only need 3 sound buttons, why?
That's right because 'sh is a digraph so 1 sound button, 'e' is one sound button and finally 'll' is also a digraph so will only need one sound button.