I'm now four weeks into the MITx electronics course and it has been great fun.
Or at least up until now it had been.
Back when I went to Imperial College for my undergraduate degree my course — nominally in "Computing Science" — we had to do more maths in our first year than the folks taking a maths degree, and one of the courses I hated most in that area was on numerical analysis. The prof was a bloke named Kenny Pitman iirc, who could never stick to the allocated time for his lectures but would always, without fail, massively overrun, indeed various classes had tried alarm clocks, big arrows taped to the wall clocks, even just verbally reminding him, but there was always "... and one more thing …" with him.
So, I still have the course book for that class: "Elementary Numberical Analysis" by Conte & de Boor. It struck fear into me then, and because the MITx course has now descended into deep maths of the same type, I got it out of storage to try and get me back into the maths the course is now demanding.
And demanding it is. Very. I had difficulty coping with this level of stuff at Uni when I was 20, and all these years later I'm not so sure that the ancient braincells are going to be able to keep up. I don't want to entirely give up the course, especially as I've got 100% on the first three lab works and home works, but …