Not only are boys joining gangs, but girls are too. About 30% of girls who join gangs have been in special education at school, causing them to have similar struggles that boys do. Because of their mutual struggle, it would seem that these girls would much rather be in the streets or in jail than in school. In school they may alway see themselves as failures, but in their gang, they are a part of something seemingly important.
It is not always the drugs, the violence, and the crime that lure teens into gangs, it could be their personal belief that all they have been able to do is fail.
http://www.helpinggangyouth.com/faqs.html (Most Frequently Asked Questions About Gangs)