On one hand, there are several benefits of using computers in education. First of all, it is believed that teachers, thanks to this modern device that they can transfer their knowledge easily without any effort of writing on board. Furthermore, the reality shows many teachers suffer respiratory diseases as a result of using chalks for their teaching cause for whole life, wheareas using computers can compeletely avoid this. On the other hand, with a screen being erupted in stead of a conventional black board, students also can access clear words, charts and graphs or so on while those written by hands are sometimes so unclear and time- consuming. Besides, students also are able to receive their taks from teacher by simply clicking mouse.