What Katy Did At School (1873) by Sarah Chauncey Woolsey (aka Susan Coolidge) (1835-1905) is the sequel to the classic children's novel What Katy Did which is based on a young 12 year tomboyish type of girl named Katy Carr who endures an accident by falling off a swing and becomes an invalid. Her cousin Helen also an invalid teaches Katy how to be a happier and kinder person by appreciating and ma...