I'm taking 6.00x and Udacity CS101 currently, and I'd have to disagree with the OP. The code checkers give you immediate feedback with test suites that are mor

I'm taking 6.00x and Udacity CS101 currently, and I'd have to disagree with the OP. The code checkers give you immediate feedback with test suites that are more comprehensive than what students would (or could, in most cases) design themselves. sure there's no professorial feedback on your code, but 90% of the time those comments you receive back on your printed out code will go unread. Not to mention the lead time, often as long as two weeks, from the time you submit to the time you receive back comments, often makes the comments worthless. as for style, my Uni Intro to CS courses didn't check my style either. I find 6.00x and CS101 to be vastly superior in almost every respect. finally, 6.00x and CS101 actually provide you with the "correct" answers after you've passed their tests with an adequate solution. I've a few times found myself hitting my head and thinking, "Why didn't I think of that! That's more elegant than my solution.", and going back and attempting to implement their solution. Try finding that in anything other than an online course.