http://intellectualmathematics.com/calculus/

and my associated rants against the standard approach, such as:

http://intellectualmathematics.com/blog/down-with-the-definition-of-the-derivative/ ]]>

I have a series of “calculus without tears, or limits” which uses geometry and I am sending you the links:

https://howardat58.wordpress.com/2014/08/19/calculus-without-tears-that-is-without-limits/

and four more.

]]>Do you agree, at least, that there’s no need to require a tangent line at a POI?

]]>I don’t really have a solution that I find totally satisfactory.

]]>What requirement would you choose, Will?

]]>