From experience: In my small rural (Midwest, USA) high school in the early 60’s, slam books were a big deal.
You went to the local dime store and bought a 29 cent spiral notebook. You wrote your own name on the cover and then, at the top of each page, you wrote the name of a classmate, a popular singer, a clothing fad, a dancer on American Bandstand, a movie star. etc. You mixed up the headings. The books were then handed around and your classmates posted their anonymous comments. You’d see kids in the hallways between classes, with stacks of spiral notebooks in their arms and you’d know they had study hall next period because ALL you did in study hall was write in peoples’ slam books! It should be pointed out that only girls had slam books. Boys did not have their own, but they were encouraged to comment in them.
The trick was to try and snag your own notebook before the end of the day so you could take it home and read it through and cry in your own bedroom if you saw anything like “fat” or “ugly” or “bad dancer”. You also tried to ferret out who had written what by using the earliest versions of handwriting analysis. Some gave themselves away by using unique color ballpoint pens.
It all came to a grinding and dramatic halt when the female gym teacher herded all of the girls into the gym and demanded all slam books. We were allowed to go get them from our lockers if we didn’t have them with us. Standing behind a huge pile of slam books, the gym teacher proceeded to dump them all in a big trash can and lecture us on our very bad behavior. We were threatened that if she ever saw another slam book, SHE WAS CALLING OUR PARENTS! (The worst punishment imaginable back then).
Slam books went away. We found other ways to terrorize each other.