Thats actually how school is supposed to work when done right.
Progressive steps that challenge but don’t overwhelm and discourage young learners. What they learn is not as important as how they learn. Every education system should strive to teach learner skills to help in their learning. Not just stuff them to the brim with facts and figures for them to regurgitate later.
A déjà vu is usually a glitch in the Matrix. It happens when they change something.