Smart people understand that knowledge is power. In our ever changing world it follows that education must be a life-long pursuit. If you aim to stay on top of your game, whatever your game happens to be, you must continually upgrade your skills and knowledge. Continuing your education as an adult is part of leading a well informed life and maintaining a healthy lifestyle. There is a lot happening in the world! There are new things to learn everyday. Take advantage of the multitude of free resources available on the world wide web.
Here are a few:
Follow this link to Udacity where you will see they offer an array of interesting and free college level courses.
edX offers courses from some of the world’s best universities.
Khan Academy has a wide selection of advanced level mathematics and science courses.
Another — Coursera offers over 400 classes from 92 institutions around the world.
In addition to the aforementioned, most of the major American universities like, Harvard, Stanford, MIT, etc. are offering online course material for free. If you have an interest in a particular university, you can check their respective websites and see what they offer.
There are also resources (usually free) available for career professionals. For example; Nurses are frequently offered free classes to upgrade their skills and certifications. In many cases, if you seek to advance your education and it is related to your current work or a position you might be seeking in the future, many employers will reimburse employees for the cost of classes after successful completion.
Whatever you decide, KEEP ON LEARNING!