EGH might be getting blocked by your classroom filters. They are a feature in linewize that set the blocked websites option to a whitelist so that only websites on the alow list arn't blocked. This is the case when you are a strict teacher's classroom. They will set up a filter to block websites, but then forget to turn it off and it crosses over to your next class, and then your next, and yadda yadda yadda. This can vary based on your school blocker, such as Lanschool, iBoss, Securly, etc.