Who do you teach the double letter sounds?
I made this wall of the WEIRD family.
Obviously, a few of the sounds are actually the same as single letters.
CK WH and PH can all be directly connected to C K W and F, and as such if you're using Jolly Phonics like me, the actions you use for these are the same, but I still separate them since students need to know how to READ the sounds.
I love seeing kids do the actions for sounds when they are trying to read!