We all hope that our children will have a rewarding and comfortable group of friends.  I am often asked how parents can support their children through the social ups and downs of school. One excellent way 
is to read plenty of books about friendship -- see my 
booklist on another page of this website.  Also, there are some excellent resources below that list some strategies you can use to help foster your child’s friendships:
http://www.pbs.org/parents/goingtoschool/social.html
For girls - 
http://www.pbs.org/parents/raisinggirls/friends/elem3.html