This is a long course of currently 14 weeks, covering functions, Taylor series, differentiation, integration, limits, convergence, sums and more. By the excellent presentation of the course (course-wiki, videos and fora) I improved in all of it's topics.
Because of the professor's clear articulation, the videos were acoustical very good understandable.
The nice animations made them also substantial clear.
Reading the course-wiki is enjoyable, too. Additional to the theory, the chapters contain examples with solutions to test your knowledge.
The homeworks were designated to help each other to understand the topics. As they were not graded, we discussed them in the fora, using LaTeX, which was fun.
To get a certificate, it was necessary to achieve sufficient points in quizzes and a final exam. It was a tough course, but really worth while.