If, and when, you get lost, you can always come back to your home page and start looking again. However, some of them will likely find it eventually, so you'd better draw up a policy on Internet access . If you have Internet access, then you probably have email. It is easy, and it is relatively cheap. All you need is an address to send to.
Some teachers have students share writing with other schools.
I didn't have my students phone or fax students in other schools, nor even share their work with other classes in the school before we had access to the Internet. I don't see any more value in doing it by email. In other words my email user name is ddice and the post office from which I get my mail is the Carlton mail server on the Prince Albert Schools domain. If you are using a new browser, then you probably won't have any need to know much about them. They're handled automatically by new browsers.