This is a very cool opportunity for anyone wanting to expand his or her knowledge of most anything. These are completely free and many of them include a certificate of achievement once the class is completed. https://www.edx.org/ These are instructed from some of the worlds best universities and usually last 6 weeks. Most will only require 3 to 5 hours a week in order to complete the class. Want to learn something new? Check the tons of classes available! I have personally taken a couple of classes in the last year or so and it really is an awesome program.