You can also set it up y to automatically open tabs at the beginning of class or limit the amount of tabs a student can open.
When you are in block mode, students can only visit the sites you allow. That can take a lot of time though, coming up with all the sites they might need. That is when you create an exception list. Group sites into lists and apply them to scenes.
Base URL
Subdomain URL
Folder URL
GoGuardian has it's own YouTube channel. The videos below cover the topic covered on this page.