Students of Interchange, Third Edition will be happy to know that they can practice their English online using Cambridge University Press' web page for this book series. Go to the Interchange, Third Edition page and click on your level. From there you can choose the unit you want to practice, and work on your vocabulary, grammar, or listening skills. There are also fun activities, like word searches, that can be done online.
So next time you need to study for the test, or just want to have fun with English, why not check out this web site?