Remove Metered connection settings
If the student has set the wired internet access to be a "Metered connection", the computer will not download MineCraft and other apps
Click on the network icon in the bottom, then click on "Network & Internet settings"
If you see "You're on a metered network" click on the Properties buttion
Switch "Set as metered connection" from "On" to Off
After it is set to the Off, click on the Close/Cross button in the upper right