We have developed three exercises to introduce the world-wide information network system, the internet into the mathematical seminar of personal computer. The subjects of these exercises are, 1) WWW home page browsing exercise to find the educational resources from the domestic and oversea home page sites, 2) Electric mailing exercise to exchange messages between the students of this seminar and 3) Home page making exercise to send a message of self-introduction.
The contents of these exercises and achievments of practicing them are reported.