Khan Academy

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So I've noticed a few sites that offer free education.

http://www.khanacademy.org Khan Academy
Pretty obvious. I find the math practice most useful. It's also a great resource for learning javascript.

Even though the videos are well done and diverse, I have a hard time following them without something to do.



http://www.udacity.com Udacity
Features the same video lecture style that Khan Academy uses, but frequently asks for feedback so the viewer can re-inforce what they just learned.

Divides courses by difficulty and keeps track of where you are in them, I love not having to spend a moment to remember where I was.

The basic computer course doesn't always leave reference material on screen when asking users to solve problems.



http://www.codecademy.com Code Academy
Is the best place for a beginner to get the hang of some computer programs (HTML, Javascript, Python)

You are taken step by step through each exercise, reference material is easily accessable. I got familiar with HTML and CSS, next time I take any courses involving those two languages, I won't be such a fish out of water.


^^All the above are great places to learn basic math, science, and programming concepts. They're free, they give you instant feedback, and they keep track of your progress.



http://www.coursera.org Coursera
I've browsed their site, I'll mention them because they have free courses.

They cover a wide range of topics. The math and science courses I looked at required an understanding of basic concepts (to include calculus).

The mention of start and stop dates gives me the impression that unlike all the other sites, you will have deadlines and can't just start and stop at your own leisure.

I'm also not sure how they give out and evaluate assignments.




A year ago, I didn't know about any of these sites. I was wondering if there are any similar sites to add to the list.

I use Khan Academy frequently. Sal does a much better job than my Lecturers.

For those studying physics and mechanics, I also recommend "purdueMET" on youtube.

Wonderful Website! I used this a few times before to help me with math class. I might have to see what other things this website has to offer. I like Crash Course on Youtube as well

I really enjoyed the finance lectures on Khan Academy. Thought they gave a good "nuts and bolts" explanation of fixed income and derivative securities and how they fit into the global picture. Never got the chance to look at the other stuff there.

Coursera's a bit trickier because the courses are paced and you need to be more self-motivated. If you've lots of free time, it looks amazing -- I have been amazed at the depth of offerings there. I've tried to take some intro-level classes on Coursera, but the challenge has always been that after I am done with a full day at work, sitting and watching a lecture isn't necessarily the first thing I want to do!

Yeah, I use this site when I have terrible math professors who just teach from the textbook

Over 90% of the stuff my current math professor writes is straight from the textbook.

This website has allowed me to train myself to become good at manipulating mathematics in my head for the first time in my life! I really could have used it a decade ago, though.