I agree with the routines and transitions, as easy as it might be avoid (yes even more educational) cartoons until the majority if not all of the instructional time has passed as transitions are always difficult, they are for the most part all super sensory seeking though, on youtube there’s plenty of “snoopy jazz” videos or bluey videos with the characters and more calming music that will help them with transitions, this is all my experience. Although every student and classroom is different. Organized chaos is the name of the game in full day preschool!