Bitly is a url shortener. It also allows you to easily save & share links found on the web. You can even share a multiple links under one short address. You might use this if you found an interesting site on a topic but the web address was very long. Copy the long address, paste it into Bitly and have a short url that is easier to give to students. Give it a try!
Bitly: A Great Way to Share Links With Your Students