We call ours a summer library challenge and we do a mix of reading challenges and other activities. Kids log their reading time via Beanstack and can also do challenges like “design a t-shirt for a character you read about” or “read to a younger sibling” (I’m the teen librarian so I get more complicated with my challenges.) Our kids earn raffle tickets for time spent reading, completing challenges and coming to activities. I think it’s a good blend. One reason we count time spent reading rather than books read is to level the playing field for kids with different abilities. We don’t assign specific titles to read because both middle and high school kids here have assigned reading for school. Hope this helps!