Though I do think this certainly has some practical application, especially for developing countries in need of expertise, I want to emphasise that this cannot be a replacement for formal, in-person education.

Education as it stands is already suffering not just financially, but by being stuck in a completely obsolete methodology, many of which are even limited to possibly the worst, 'lecture'-type teaching strategy. Teaching hasn't changed for generations, but our world is changing rapidly by the day, and this needs to be reflected in education.

We're no longer trying to train factory workers, but innovators, and lecturing does little to help this.

Lectures are also obsolete because we have the internet, and we can acquire the same input from YouTube or other educational video sources these days for free and in our own time. When it comes to many courses in Universities for example, the only thing you're really getting is the incentive to connect with people and get an official document purely because you put yourself in so much debt - better make it worthwhile.

A teacher abroad cannot interact or engage fully with most classes if limited to watching a screen; that's not how kids function. In some older classes preparing for exams or University, this could be worthwhile, but if there's any attempt to teach the younger groups, the in-house teacher will have to play a much greater role and both teachers would need to plan intimately with each other how the class is to play out in a way that is truly engaging, diverse and variable.

This I think might be a limitation to the exponential growth idea since it would really need a mutual understanding between two individuals. Not every student is going to raise their hand when confused, and students ahead of the rest are going to feel bored as we all move along at the same pace like a factory conveyor belt.

Fundamentally, the greatest problem to address is the style of education, and I would suppose with some creative input it could be applicable to this system somehow, but right now I just don't want the world to see this as a complete replacement for poorer quality education.

A teacher with no knowledge at all is better than a fully qualified one if the former teacher can inspire and invigorate the students' lives when the latter just writes on a chalk board in silence.

Anyway, steemstem supports this regardless! Upvoted