A couple years back I picked up an Apple II "SchoolBus" networking card, made by Apple. According to the promotional literature I was able to find, it looks like it allowed several II/IIe's to be daisy-chained together and share a "server" Apple II and share a Disk II and software. Essentially a teacher could "push" programs to students to work on, similar to teachers using Google Classroom, etc, today.
I haven't found much more information than this, and I'd really like to hear from someone who has had experience with it. My interest in retro apple tech stems from the K-12 world, anyone with experience with this, I'd like to hear from.