My gut reaction was "wow that sounds boring" but then I reread it and realized I would have absolutely been excited about this in high school.
https://i.imgur.com/iVNVleR.jpg
The media I copied from took up 28x 3.5" HD floppy disks. It's possible they were copied from what was originally a CD-ROM. I don't remember clearly anymore.
Note: I'm not trying to refute or correct your 13-disk figure, which was clearly a different installation set, and likely original Windows 95 rather than my OSR2, which came out around 1997.
[0] https://devblogs.microsoft.com/oldnewthing/20050819-10/?p=34....
Now I know why.
Edit: just checked in Google. Win95 was just 13 floppies. But you had MS Office and other software that was additional floppies to install.
We'll, still is, but in high school too.