With the built-in Apple Screen Time App, you can easily monitor usage, schedule downtime, and set limits on your child's LFSF school computer when at home.
You do not need to have a parental account. Simply log in with your child's credentials, navigate to 'System Preferences' > 'Screen Time' > "Turn On..." > "Use Screen Time Passcode" > set the passcode > configure Screen Time to configure your child's access.
The following Apple Support article provides additional instructions on how to setup Screen Time:
- https://support.apple.com/en-us/HT210387