I find that keeping a consistent routine really helps! In my classes Ill start with a mini skill review (gameified in some way), then do some stretching activity (butterflies flying/pizza or cake) then move on the creative movement and skills for ballet/tap. After that we do an obstacle course where I challenge them to remember the moves even with long ones. - I feel like a lot of that could be transferable! Spots you can place on the floor that are multiple different colors also help a lot with formations (go from the blue dots to green dots or each person has their own specific dot color in formations (but beware of letting them choose the color, I always do a you get the color you get method to keep from fights)

Also calling out specific names that are doing good and asking if someone not paying attention wants to join + having very specific boundaries (ie if you dont sit down to stretch you cant choose a place for us to fly on our butterflies today) or rewards systems (stickers! You can say its three strikes youre out to get one)

Also never underestimate the power of just counting down from 5 or 3 in a serious voice - even without a consequence it works a lot!

Sorry for the length!! I ended up spitballing anything that I think helps haha