You can use Jamf Parent to choose which specific apps your child can use on their school-issued device for a set duration of time.
The Allowed Apps settings are applied to the child's device.
If a child's device is offline, the settings will be applied the next time the device is online.
To clear Allowed Apps settings before the configured time is over, tap Allowed Apps and deselect the checkbox next to each app you want to remove, or tap Clear All to remove all applied allowed apps at once, then tap Save.