Tween shutdown often means cognitive load has exceeded capacity, too many things competing for mental space at once. Multiple subjects, social stress, and complex new content can combine so that any single task feels impossible. What looks like giving up is usually the brain honest signal: I am full. This is the Struggle stage hitting its limit. The response is not more pressure, it is a real Release, followed by a return. When shutdown is frequent, check all three Cs: does your tween have genuine say in their approach? Is the relational connection between you warm? And is the demand sitting too far above their current capacity?
I can see this is a lot right now. Let's not try to do all of it. What is one small piece we can actually do?