I've taught Fourth for 20 some years now. It's the best grade level
You must be departmentalizing since you're teaching math and science. We have 2 teams of teachers who share students. Its super important to have expectations and rules the same. We use a check mark behavior system. Our behavior clipboard travels with our classes wherever they go (specials music, gym, etc.,,) too.
I Know my teaching partner , who teaches math and science, starts with math. Students fill in planners for homework as soon as they get there. Then she reviews hw. They also have online practice before the days lesson. We have Chromebooks for all.
We spend the first 2 weeks practicing all our procedures and rules, while teaching content. It's slow at the beginning but worth while. We teach them how to pack up their materials for switching classes, how to carry their Chrome's, etc.
We also constantly discuss students and what's working and not. We've changed many procedures through the years.especially to most effectively switch without wasting time.
Best of luck to you. Keep posting back with questions and share how it's going
