books.google.com - Never before has school been this mixed up—or this much fun!Could Mrs Roopy, the new librarian, be A.J.'s craziest teacher yet? When the class shows up they find her dressed first as George Washington and then Little Miss Muffet. And Mrs Roopy won't even admit that it's her! Can A.J. and his class...https://books.google.com/books/about/My_Weird_School_3_Mrs_Roopy_Is_Loopy.html?id=lxVspxKp4GgC&q=tree+house&utm_source=gb-gplus-shareMy Weird School #3: Mrs. Roopy Is Loopy!