MOOCs - Massive Open Online Courses
Over the past few years, a variety of services have emerged like these:
These services are known as MOOCs - Massive Open Online Courses
All of these services and resources are AWESOME!
While some MOOCs try to bridge towards offering their courses under "certificate" or various other pseudo-academic credit models, none are really replacing the tried-and-true real acadmic credit from a real academic college/university
MOOCs are kind of like libraries: they have lots of resources, and you can "go through a course" but really they lack the human interaction involved in conducting a real academic course.
If you have to complete Calculus I, you cannot really tell someone, "Hey, I went to Library and read some books on Calculus".
MOOCs are little bit better than just going to the library and checking out some books on calculus, but there is a reason other colleges and universities do not accept their "certificates" for transferrable credits.