Val, this is an excellent summary.

I would add that the current, common model of moving children from subject to subject every 40-60 minutes, when combined with teachers who do not have subject matter expertise, is problematic at best. How much better might it be if the days were structured to focus longer on specific subjects and/or hands-on projects. So for example, a child might only have four classes in a day, but still cover all subjects during a week without losing the time that it takes to move 20-35 young children from one subject to the next. Depth and breadth could be gained at no extra cost.