Chromebooks use wireless to connect to a network so you will need WiFi at home to use the Chromebook on the Internet. If you have WiFi, your network security key can be added to the Chromebook before log-on. If you don’t have WiFi at home, the Chromebook will still work for many things (most apps, reading eBooks, etc) but, for example, email and web browsing won’t be accessible until the Chromebook is back within the School network.