I think this approach would need adaptation for a classroom of younger students. "Younger learners" reminds me of the Montessori method: "self-directed explora

I think this approach would need adaptation for a classroom of younger students. "Younger learners" reminds me of the Montessori method: "self-directed exploration driven by children’s natural interests". A knowledge graph could serve as a playground for exploration. While boxes and arrows might work for children learning to read, I'm sure there must be many other engaging ways to present this information to younger students. Spaced repetition traditionally uses flashcards to test recall, but it could evolve into task-based learning. Instead of just recalling facts, learners could complete tasks as proxies for understanding. For example, solving a physics problem could indicate mastery, while struggling might signal a need for review. Designing these tasks would require collaboration between educators and developers. Teaching students how to self-assess and decide what to learn or refresh next would be invaluable. Anyway, I think of this stuff often since I always have a huge backlog of things to learn myself, but I haven’t spent a lot of time thinking of how to adapt these things for children, so I'm sure I'm missing many important details.