College students need to use many learning tools in their study, such as online class, sign in at ordinary times, and release and completion of homework. There are various tools for downloading software online, and each software has its own different uses. Usually, the teacher will post questions on it to test your study and urge you to study, which is also counted in the usual grades. Some elective courses in the school need to watch videos online. In order to facilitate teachers to count the number of students, they need to download relevant videos. Sometimes computers are not as convenient as tablets. Because the epidemic situation is more serious now, more network tools will be used if you attend classes online at home.