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The family dog and cat are convinced the new rabbit is a vampire — one that drains the juice out of vegetables rather than blood. A 1979 chapter book, narrated by the dog, that outlived its own decade and kept turning up in classrooms long after.
Harry loves horrible things — slime, snakes, gross schemes — and his loyal best friend Doug narrates the chaos from Miss Mackle's class in Room 2B. Suzy Kline's chapter books were Scholastic order-form gold, and if you remember it as Room 3B, you're not wrong: the class moves up to third grade in the later books.
That Junie B. Jones is a kindergartner with a MOUTH on her, and that's why everybody loved her books. Barbara Park's first-person tornado narrated school exactly the way kids actually talk — bad grammar and all — which made her a 55-million-copy juggernaut AND a banned-books-list regular.
Jack and Annie climb into a tree house full of books, point at a picture, and the whole thing spins off to dinosaurs, knights, or the deck of the Titanic. Mary Pope Osborne's chapter-book series turned a generation of kids into readers — one 'research trip' at a time.
Louis Sachar's school that was supposed to be one story with 30 classrooms but got built 30 stories tall with one classroom per floor, and no 19th story. The first book is from 1978; the sequels followed in 1989 and 1995.