In large universities elementary science courses are often taught by groups of staff members instead of by individual professors. Each series of lectures is presented by a different lecturer. The lecturers are chosen according to the areas of a field in which they have done research. The lecturers are presented in large auditoriums, and they are often attended by as many as 200 students. In addition to listening to lectures, the students are required to attend quiz sections which are supervised by assistants. In the quiz sections the lectures are discussed and text readings are assigned. Quizzes are given regularly once a week, and the quiz grades are recorded and averaged at the end of the semester. Most foreign students aren't used to taking weekly quizzes and they don't like this system at first. Once they get used to it they like it because they find that it helps them keep up to date in their assignments. Laboratory experience is also provided for in these elementary science courses. Each student must complete certain prescribed experiments, some of which require complicated equipment which must be set up by a lab assistant. Sometimes two students working on the same experiment check each other's results. This practice is advantageous as long as each student does his best and has confidence in his own ability. It is unprofitable when one fellow perpetually depends on the other for the right answer.cari kalimat pasif dan arti kan ke bahasa indonesia?​