MOOC, or Massive Open Online Course, is a great way to find a free or paid course you are interested in. I have found 6 sites where teachers and students can access great learning opportunities. This summer I encourage you to take a MOOC and see if this type of learning could work for you and/or your students. Below is a list of MOOCs to get you started if you choose. Each image is linked to the corresponding site.
I have embedded a video below to give you a bit more information MOOCs.