When a device reaches the school WiFi, certain restrictions are applied and these restrictions will remain in place until the device goes home.
For the school restrictions to be removed, the device needs to 'check in' with Jamf School to confirm it is no longer on the school site.
It may be that this is does not take place as soon as you get home, the steps below will show you how to initiate a 'Check in'
Open the Jamf School Student app
Leave this open for a couple of minutes to allow the device to check in and the all home app should be restored.
If the restrictions have still not been removed, a 'Check in' can be forced by clicking the cog icon in the top right of the Student App.
Select the iPad under 'My Devices' and then select 'Refresh Info'.