Q: Ipads not connecting to some websites

HI,

Make sure those websites aren't being viewed in Private mode.

Turn Private Browsing on or off on your iPhone, iPad, or iPod touch - Apple Support

Another point of isolation might me to download a different browser such as Google Chrome and see if you can reproduce this issue. Is this only happening on that schools WiFi?

Could be a DNS resolution issue. On one of the affected iPads try changing to Google's DNS:

Settings > Wi-Fi > Click on the Network, Delete all numbers under DNS and enter 8.8.8.8 or alternatively 8.8.4.4

See it this helps....

Is it possible that the iPads are blocked by the school router from accessing "entertainment" sites, while the laptops have been allowed?

Is there more than one WiFi network at the school, maybe "teachers" vs "students", with different privileges?

Diana.McCall wrote:

 

Is it possible that the iPads are blocked by the school router from accessing "entertainment" sites, while the laptops have been allowed?

Is there more than one WiFi network at the school, maybe "teachers" vs "students", with different privileges?

Exactly what I was thinking. The OP said we so we know this is school-wide and they aren't having any other issues with using the internet from what the OP made out.