I created Calculus One on Coursera during the Spring Semester of 2012–2013; over 47k students enrolled, and a couple thousand students completed the 15-week course.

To complement the nearly 200 short lecture videos, we also built MOOCulus, a adaptive learning platform for calculus problems.

During Fall 2013, Bart Snapp ran the second iteration of Calculus One on Coursera and during Spring 2014, Jenny George ran the third iteration.

I've built a couple follow-up courses now, including a Calculus Two course on Coursera.

You can find the course videos on YouTube starting with “What is a function?”

You can find the course on iTunes U.