The American university classroom atmosphere is very dynamic. You will be expected to share your opinion, argue your point, participate in class discussions and give presentations. International students find this one of the most surprising aspects of the American education system. Each week professors usually assign textbooks and other readings. You will be expected to keep up-to-date with the required readings and homework so you can participate in class discussions and understand the lectures. Certain degree programs also require students to spend time in the laboratory.