1. The MIT OpenCourseWare is not the same as getting an MIT education. You will not be able to get a degree or even college credit - in fact, you don't even have to register to get started.
2. The courses are not exact replicates of MIT courses and you will not have access to the MIT staff and faculty.
Have kids in high school? Teach high school? Check out the Highlights for High School section for some wicked cool resources and even high school courses created by MIT students. FUN.
Some very cool things are happening online with open source offerings and this is just one! I promise, this will blow you away - don't miss out.