I can't really remember the name its a story about a teacher who was very nice but then left and a really mean substitute teacher came in her place I'm not sure if then the mean teacher was acually the nice one in disguse and it was her plan to teach the students a lesson about apreciating her but anyways it was one of my favorite books when I was little and I'd like to know the title of it so I can get it for my brother Please HELP its driving me crazy lol