Bully Beans, by Julia Cook, is about a group of kids who have to decide to stand up to the new girl Bobbette who is bullying them. One of the students finally gets tired of being bullied and decides to tell her parents about it and they give her bully beans (jelly beans), and tell her that if she and her friends eat a bully bean then they will be immune to Bobbettes bullying. They were able to stand up to her when she was being a bully because they ate thier bully beans, and they even tell their teacher what is happening. Eventually Bobbette admits that she was bullied at her old school and that she thought if she was the bully then she wouldn't get bullied. This is a great book to introduce bullying either on the first day of class or within the first week. You can even set up a system where you have a jar of bully beans in you classroom and every time a student is getting bullied they can go get a bully bean and write down who is bulling them on the "Bully Slip" that will be beside the jar. They will then place the slip in another jar (anonymously), then you can look at the slip and talk to the student who is bullying, while remaining completely anonymous. You can get to the root of the problem without causing any problems between students. You can do many different activities with this as well as a writing activity where they write about a time they were bullied, or you can even do some sort of math activity with "bully" beans to help reinforce a math lesson. This can be used for grades first through fourth. 

Excellent, excellent book. I keep it on hand and refer to it all the time. I highly recommend it. Parents who are interested in helping their children understand math could read the initial chapters about the foundations of teaching math and then refer to section 2 when teaching specific concepts. If you home school and do not use this book you should probably be incarcerated, especially if you are not confident of your own math abilities. Parents who understand math could benefit from this book too, especially if you are frustrated that you are not transferring your knowledge successfully. I love this book so much I am probably going to buy the new edition and read it for a third or fourth time.