Guidance on school firewalls
Here are some tips for accessing Bramble from behind a school firewall.
Bramble data and webRTC traffic operates over standard ports via TCP, UDP using HTTPS, WSS & TURN which means Bramble works across most firewalls. Under very strict whitelist only firewalls you may have to make some changes.
The tuition provider you're working with will be able to provide you with a link to a firewall test which outlines any changes you need to make. Some school network providers are able to quickly whitelist Bramble on request, so it's worth getting in touch with your network provider too.