<p>Personally, I kinda like the anonymity of big lecture classes. But anyway, my college has about 23,000 people in it so I guess I'm qualified to answer. </p>
<p>There's still homework in college. Math problems if you're in a math class, lab reports in lab sciences, papers and reading responses in english classes. I have online homework for my french class, where you have to fill in the blank with a french word or pick a word from a list or listen to a recording of something in french and choose which answer goes with it, etc. Sometimes the homework isn't "required" per se, but you benefit from doing it anyway (and sometimes the profs will take it up for extra credit or something), such as math problems, because it helps you learn. Obviously, lab reports and papers are going to be turned in every so often for a grade (once a week to once a month depending on the course and instructor). </p>
<p>Readings are also often given especially in big history lectures that aren't necessarily discussed in class. You're still expected to know it for the test though, because it was assigned reading. </p>
<p>In the smaller classes that are like 20-30 people, professors generally know your name or will at least recognize you outside of class. Big lecture halls can be upwards of 300 people, so unless you make an effort to talk to you professor before/after class or go to office hours, they probably aren't going to know you. </p>
<p>Sometimes I get to know my classmates. I'm generally a quiet, reserved person in class and don't talk much to people so I can go an entire semester without knowing someone's name even in a 30 person class. I only know the names of two girls in my 18-person french class right now and that's because we had the last french class together as well and that teacher made us do group work alot. I have met more people outside of class and figured out "hey, you're in my chem lecture! we should sit together" or something, than have actually met them in class. </p>
<p>Generally when I have a GTA (grad teaching asst) that teaches a section, I'll get to know them enough when I can actually speak to them outside class and know each other's names. Professors, not so much, but that's generally because the professors are teaching the HUGE classes and the GTAs will teach a mini section or something. Also, GTAs are easier to get to know because they're not that much older than the undergrads. I actually have some friends I've met who are grad students and who GTA classes (not ones I'm in though, cause that'd be weird). I do know a freshman girl who I met who came to a party at my friend's house and she was like, "Oh my god, that's my bio lab TA dancing over there" and it was another friend of mine who is a grad student. (I'm a sophomore)</p>
<p>Tests are just harder in college. They cover far more material in one test. In high school, you might have a test on a chapter or two, but in college a test can cover 5 or 6 chapters at a time. Sometimes your grade is based solely on 2 or 3 tests and the final. This is mostly true for the big lectures. Smaller classes tend to have more tests that cover less material at a time, and sometimes have quizzes as well. My french class has 4 tests and the final, and 5 vocabulary quizzes.</p>