[caust1c]

My guess would be training. You can have an online-supplemented course where most of the material is pre-canned and the teachers know just enough to guide the students through a semester or a year of class.

I doubt they intend on teaching much beyond the basics at that level, which shouldn't be hard for any teacher to learn.

[HarryHirsch]

Good Lord. Here's an excellent talk about why mathematics teachers should know mathematics: https://math.berkeley.edu/~wu/Lisbon2010_2.pdf

That's mathematics, not didactics of mathematics.

[dboreham]

Haha haha. Source: I have tried this.

[saagarjha]

Nope, this doesn't work. You get teachers who can basically teach students to memorize a bunch of computer science topics, but not those that can help at all in helping students when their code inevitably doesn't work.