Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I'm not sure of the current status but you can have a look at these:
microsoft office 365 for homeschoolers - Microsoft Community
Announcing: Homeschool pilot program for Office 365 Education
Microsoft 365 for Education - Home-Schooler.com
You also have the option of using the free Office Online web apps in a browser. They aren't full versions of the desktop software but depending on the requirements of the students they may be sufficient, at least for beginners.