Hi, K. -
I'm sure as hard as this is on your daughter, it's equally hard on you. All through my life, my Mom and I have been extremely close, and I know how much she's suffered with me any time I've hit painful obstacles in my life.
From first through fourth grade, I had a wonderful experience at school, feeling accepted, enjoying my classmates, and generally "fitting in" just fine. I was always slightly overweight, but I was never teased during those years by my classmates, and I only recall being teased one time at that school by someone I didn't know.
That all changed when my school closed and I changed schools to enter a Gifted and Talented program at another school, a different school from the one my other friends were transfered to. I had absolutely no preparation for how different and miserable things would be there for me. I was definitely ostracized and teased, shunned, and made fun of. The girls in my class were very snide and conceited, and they didn't think I dressed right or fit with them whatsoever. Thankfully, the boys were nice, but the classroom environment for those two years was very unhappy for me. I was not grossly overweight, but, nevertheless, I was not a stick-thin kid, and I remember one of the nastiest girls, whose name was Andrea, offering to pay me a quarter to eat something one day in the cafeteria, like I was some kind of sideshow.
Fortunately for me, I had other activities in school, such as choir and orchestra, and I became a whiz at doing acrobatic tricks on the uneven bars on the playground. That was a big deal to the "playground kids" who were not in my class, so I gained a level of admiration and acceptance with them.
Anyway, thankfully, those two years passed, and I reunited with my original friends from Jr. High on, and all was wonderful again.
Years later, after graduating from high school with lots of honors and even having been Prom Queen, I ran into that nasty Andrea at a restaurant, where she was my waitress. I was tempted to really give her a run for her money, but I didn't. She didn't recognize me, and I was glad to have the chance to have her serve ME a little bit after how much she had tormented me as a child.
My best advice is this: if your daughter can learn now how to make friends of substance, that will help her for the entire rest of her life. The popular kids aren't necessarily popular because of their humanitarianism or deep qualities of friendship - that's not to say they're all bad. But, if she's not "in" with them, then maybe she should see that as an indication that she's a different sort of person than they are, and that is likely a good thing. It's invalidating to ourselves if we continue to quest after the attentions of people who are not interested in us. That's a pattern that can repeat in romantic relationships and also in the work place. The challenge is to find those situations where we are desired strictly for who we are and what we bring to the table.
I'd encourage you to help your daughter shine in those arenas where she has particular strengths, talents, or interests. The school environment is such a closed circuit. Bust her out of there into some activities that don't have anything to do with school so that she can expand her social horizons beyond the immediate. I never did enough exploring of this kind when I was younger, and I truly wish I had. It took me until I was in my 30s to find that I love volunteering with animals, and my animal shelter buddies are from all walks of life, most completely unrelated to my usual professional or social circles.
Help your daughter be true to herself and find those people who she can have true kinship with, and I guarantee she won't long for the popular kids' nod of approval so much.
I wish you the best. I know this is very hard, but take heart that this may be a valuable lesson learned early that will benefit her for the rest of her life when everyone else is struggling to find themselves.
H.