Find the links to the interactive widgets from lecture notes here:

Widget Link
Tangent and Velocity Problems https://www.desmos.com/calculator/y5e4aggi9w
sin(pi/x) and limits https://www.desmos.com/calculator/4sfzeajdjz
Discontinuous Function is non-differentiable https://www.desmos.com/calculator/nquzd2ocqg
Linear Approximation https://www.desmos.com/calculator/kn0jgdo9ab
MVT and Rolle's Thoerem https://www.desmos.com/calculator/fa8thrwmvg
FTC https://www.desmos.com/calculator/leceuumyqp