[tmpmov]

I like this take on introducing derivatives.

My first intro to derivatives was a little less than 20 years ago, but I feel like it was very much in the "traditional" vein of: Suppose we have "f'(x) = lim(h->0) (f(x+h) - f(x))/h" and we substitute in various equations. What will f'(x) be?

The difference as presented here: I (re?)learned an estimation method for decimal place mathematics while at the same point tying it to a larger/underlying principle.

I think a great approach would be to then do the stuff I started with, e.g. finding f'(x) given f(x).

Out of curiosity, how many of you have seen the approach as seen in the above article? I can't recall seeing it before, but again, it was a fair time ago for me.