My 11th grade daughter starts with davening at 8:35, and has class all day (her regular schedule) until about 4:40 or 4:50. That includes gym, art, and a computer class for which we now have to buy the Adobe program they are learning. This coming week, the last few teleconference classes are transitioning to Zoom. They are required to wear their uniform.
My other kids have significantly less, but probably as much as they can handle of the home-learning format.