Elizabeth here, co-founder (and clinical child psychologist). Fair question. Catalin's post was about the engineering (he is my co-founder and our CTO), so the learning side got short shrift :).

Here's what it actually looks like for a child. Say a 6-year-old is reading a story out loud (I will use a reading example here). The tutor is listening to every word. When she stumbles on "chick," it doesn't just tell her the word; it decides, based on her history, whether to break it into sounds, point back to a pattern she's seen before, or let her wrestle with it a moment longer because she's close. If she misses the same pattern twice, that digraph shows up woven into her next story. If she reads fluently but can't tell the character what happened in the comprhension conversation after the story, she gets another text to work on comprehension instead of just pushing harder words. The instructional approach isn't novel or new, it's what a good teacher does, grounded in the science of learning. We run evals on the interactions and real subject matter experts are grading and annotating the behavior. What's new is doing it responsively, for one specific child, on every turn.

On engagement: I'd push back a little on the framing that engagement and learning are separate things (anyone on our team will tell you this is a drum I have beaten for years). A disengaged child learns nothing, no matter how good the pedagogy is. But we're not optimizing for time-on-screen. The lessons and sessions are bounded. The engagement work exists so the child stays in the productive struggle zone long enough for the teaching to happen.

Why AI: it's not that AI "needs" to be the solution. In fact, a great human tutor is better, full stop, but it has never scaled. A classroom teacher with 25+ kids teaches to the middle. This is the first technology that can make real-time, child-specific teaching decisions, which is what tutoring actually is. More on the pedagogy here if you're curious: https://www.ello.com/our-teaching-approach)

Thank you -- your post was downvoted into being hidden for a while, sorry I didn't see it earlier. This context is helpful, the example of the system delivering reading challenges that match their struggles makes a lot of intuitive sense to me.

I really appreciate that (it seems to me) your goal is not to replace human tutors, but to raise the general baseline. You emphasize scaling, how does that work in practice if you're trying to target audiences who may not have access to devices that can run your program? What is your plan from the perspective of funding and resources to scale infrastructure as needed to support these audiences?

Edit: I also think of other learning systems like duolingo and the application of tablets and computers in schools which begin from good places, but I'm curious if you are studying these alternatives and what you have learned from them?

I really think your goals are great, and if you're starting your design of this system from research about effective learning methodologies and working backward from there rather than starting from AI and working backward from there that erodes a lot of my personal skepticism about a project like this. I hope you find a way to make this work.