There Is A Light At The End Of The Tunnel! by: Randi L.
Long before entering the culinary world I was; and thus will always be a teacher, and mental health pro. Therefore, I have a bit of an inside clue on how to overcome child obesity with experiential ease.
James Rouses' response was right on, but I am going to take it a step further and suggest that you provide healthier food options within the home such as getting rid of all soda, all prepackaged (poccessed) foods and begin making and eating only homemade food and snacks.
The above is obvious and Mom you are doing good, for reaching out is a grand step! However to raise your daughter's sense of personal security as well as her self esteem while reducing the amount of flab requires another step stated in a suggestion:
Why not set up a plan with the schools PE teacher/sports coach whereby your daughter works out (Weight lifting, callistenics, etc.) with the school athletes early in the morning or after school. Sure initially they may pick, but their coach will not allow such, and as she starts to develop some muscle while decreasing some of that weight and associated flab friendships will develop and she will begin to look and feel better about herself.
As her self image improves, she may gain the confidence to ignore those bullies simply by smiling at them and walking away.