The Internet is very useful for teaching English. Teachers can use it for gathering information for their classes, including teaching plans and materials for classroom use. They can subscribe to mailing lists related to TEFL/TESL, and exchange information with other teachers. They can subscribe to electronic journals or newsletters either by e-mail or using the World Wide Web and keep up with new trends of English teaching, finding new or interesting publications. They can consult with publishers on teaching materials.
http://www.cis.doshisha.ac.jp/kkitao/online/internet/art-use.htm