Much more emphasis is placed on final exams than on daily homework assignments or quizzes.
The lab experience you receive is also incredible. But learning doesn't start and stop with the professor's lecture. Sitting next to British students in all of your classes allows you to learn more about a lifestyle that is different from your own. You have to adapt and learn to not only take the notes the professor just wrote on the board, but how to interact with people that have a different outlook on life. This makes for great conversations about life, politics, and just about everything else.