Robert Coles has written a helpful book on raising moral children. Janice Cohn has written Raising Compassionate, Courageous Children in a Violent World. Charles Smith's book The Peaceful Classroom would also be a fine resource for helping kids develop respect for others. I'd also ask a children's librarian to help you find books that deal with appreciating differences and being kind. Doing a content keyword search on amazon.com always provides a comprehensive list of valuable titles, including brief reviews. Good luck; I applaud your efforts.
Teased in Preschool
Toddler and Teenager Expert Advice from Carleton Kendrick, Ed.M., LCSW