Many families have their own web filtering solution for their home. If you use filtering solutions for your home network it could possibly be conflicting with our school filter that filters the internet access for all students. You would have to allow our filter address (https://proxy.zcs.org/) to your "allow" list. Here is an example of that if you are using Circle by Disney.
https://sites.google.com/zcs.org/zcstech/disney-circle-users?authuser=0