Exactly how you do that will depend on a huge variety of things, including how you actually store the information for all students, not just the three your user is interested in, but the basic mechanism is the same. There are three basic ways to do it:
1) Query string. URL's can contain additional information, to the right of a question mark: you've probably seen it loads of times with Google queries and so forth:
mydomain.com/mypage.apsx?key=value
You can use the same thing when you redirect them to the second page. The page then accesses the query string and finds the list of students.
2) Cookies. You can send the information to the client and it's stored on his computer. The second page then access the cookies during page Load and displays the student info.
3) Session. This is stored on the server and the second page accesses it directly to fetch the relevant students.
There are advantages and disadvantages to each, but you'll need one of them. Google can find you the exact way to use them if you just search quickly.
[edit]Typos[/edit]
Submit an article or tip