Children can take lessons in that school via the Internet and can score extra points like e.g. in Geography or History. That sounds very promising and is a fantastic basis for future steps.
The world does not have tidy endings. The world does not have neat connections. It is not filled with epiphanies that work perfectly at the moment that you need them.
It's not the last one. Five's out, six is coming out in November, that's a single chapter, and then seven is the big horrifying one. And I think a couple after that to wrap the thing up.