How can I effectively limit my teenager's internet usage?

Episode 1234 (2:16:08)

John from Altadena, CA
Dell Chromebook

John wants to lock down his internet for his kids. Leo says that the trick is to block it with OpenDNS from the router itself. Change the DNS settings on the router to block it. Then he'll need to lock it down on his system to prevent changes.

Is there a way to block certain things in the hardware? Leo says that he can get a hardware device that will block it, but they slow things down. The Apple router used to have the capabilities to do Mac filtering, but they've taken that out. Leo says to get a new router that supports that function. Then he'll have to try and lock down the Chromebook itself. John should set up Supervised Users on the Chromebook. has a technote that may help.