Your education doesn't have to stop once you leave school—freedom from the classroom just means you have more control over what you learn and when you learn it. We've put together a curriculum of some of the best free online classes available on the web this spring (yes, and winter) for the latest term of Lifehacker U, our regularly-updating guide to improving your life with free, online college-level classes. Let's get started. Orientation: What Is Lifehacker U? Whether you're headed to college for the first time, you're back in classes after a fun, food, and family-filled holiday break, or you're long out of school and interested in learning something new, now's the time to turn it on and amp up your skills with some interesting and informative classes and seminars. Anyone with a little time and a passion for self-growth (and a computer) can audit, read, and "enroll" in these courses for their own personal benefit. Schools like Yale University, MIT, Stanford, the University of California at Berkeley, and many more are all offering free online classes that you can audit and participate in from the comfort of your dorm room, office chair, couch, or computing chair-of-choice. If you'll remember from our Fall 2013 semester, some of these classes are available year-round, but many of them are only available during a specific term. Because we're all about helping you improve your life at Lifehacker, we put together a list of courses available this winter that will inspire you, challenge you, open the door to something new, and give you the tools to improve your life. Grab your pen and paper and make sure your battery is charged—class is in session!

Computer Science and Technology

Finance and Economics

Science and Medicine

Mathematics

Social Sciences, Classics, and Humanities

Law

Cross-Disciplinary Courses and Seminars

Extra Credit: How to Find Your Own Online Courses