The course coordinator posts daily homeworks, videos, and solutions on the above site. Check the MATH 220 link.
Extra worksheets, videos, and the like can be found at the site above.
The worksheet is not useful for understanding the derivative, but may be useful for drill; it consists of a lot of functions which you can differentiate.
This worksheet is meant to be a somewhat guided exploration of the derivative as a sort of 'best' constant approximation to (change in output)/(change in input).