Even in the late 90s/early 2000s they had a program set up in my district which gamified reading books. For the books in the program you could choose to take a

Even in the late 90s/early 2000s they had a program set up in my district which gamified reading books. For the books in the program you could choose to take a quiz that would effectively test whether you read and comprehended the content. If you passed the quiz, you'd get points based on how well you did on the quiz and how long the book was. Those points would add up and you could use them for prizes at the end of the semester.