Go Noodle
This is one of my favorite sites! It has great classroom movement break videos and it’s free! The students get to pick characters and they level up. There are many great alerting and calming clips.
Jam Program
Simon Says
Marching
Jumping Jacks
Hopping in place
Yoga
These types of breaks and activities can be teacher or students lead. I have also written down activities on Popsicle sticks and let students select them.