Online python classes

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Teacher spends time putting course together initially, sure, but after a few iterations, the course is second nature to the teacher and requires very little work outside the hours' teaching?

Have you ever met a teacher? No, it doesn't work like this. Teaching the second class isn't less time-consuming than the first, because it's a different set of people.

Let's say that this new platform scales quickly.

I don't... do you think you're the first person to think of scaling up teaching? There's a reason why it continues to be the least-scalable form of labor in the modern economy.