Online computer programming problems/quizzes?

I've been reading up on several programming languages (c#, c++, vbscript, java, perl, python), but all of the tutorials seem to just be basic "Hello World", If statement stuff. I'm looking for something that gives you a task that you have to make a program for, then tests it to check or or gives you an answer (sort of like what you'd get in a programming class). Things similar to, but more practical than projecteuler.net. Thanks!