My thoughts,
All of it is incredibly ambitious. However, knowledge collection with supporting AI technologies to make collection and curation easier is highly needed. There are no doubts about that.
If we get the collaboration design and related features right...
I would first lay some foundation stepping stones of knowledge collection of questions with simple AI augmentation as you detail (context feedback loops will be especially important. Example: Car(train carriage), Car(automobile) ). And then iterate and expand with community involvement on providing answers through whatever mechanisms, AI, programming, might make a young student smile.
Context will be the thorn to constantly pluck out and disambiguate. But don't be disheartened since even the largest Q/A and Search companies have a constant struggle and have slow improvement processes. Good things sometimes take time.
I wish you and the team the best of luck, Adam.
Thad https://www.linkedin.com/in/thadguidry/ https://calendly.com/thadguidry/