On the one hand, computers assists students to obtain knowlede at a more substantial level of many subjects via educational softwares. These containing lively sounds and vivid images seem to attract more students’ attention than bookish and merely boring lessons. History and literature which are regarded theoretical subjects in these days have become more appealing thanks to documentary films and rehearsals screened in computers. Furthermore, students can acknowledge chemical reactions in chemistry or phenomena in physics more manifestly on the grounds that they witness them from slide shows.