I love the book "Ping and Pong Are Best Friends (Mostly)" to discuss feelings of jealousy. I created this packet for small groups, individuals, or classroom lessons. It can be used for feelings of rivalry between peers or siblings. The packet includes: 6 versions of Venn Diagrams to compare characters, students, and siblings, 2 self esteem pages where students write/draw about what they are good at, 2 feeling and strategy pages, a problem solving page.
*please excuse that it prints out a few blank pages. No matter what I do it won't delete them =/