My daughter is now 11 yrs old and has had big birthday parties since the age of 5, inviting family friends and girls from school....the trick is to invite the girls with grace. Dont have your daughter bring the invite to school and hand out in front of all those not invited. I have sent them to school and asked the teacher to make sure they get placed in the childs backpack before the end of school, i have also asked for the childrens phone numbers or gotten last names to look the numbers up myself and called the mothers directly to invite the children, or mailed the invites and avoided the whole "school" disbursment all together. I dont think your child should be required to invite all girls in her class against her choosing...not fair to her. Not to mention, it really is a fact of life you wont always be invited to every party in life...get over it early. My daughter has had many friends throw parties and not recieved an invite, later to find out that the mother stated 3 only and she was not one of the three, has never been hurt over it and keeps her friends irregardless of whether she is invited to their party every year or not! no biggy...I just always talk to my daughter about thinking of others and not being rude....I ask her not to hand the invites out in the open and try not to talk too much about the party while in school, not to make those not invited feel bad!