Adolescents who are gay have much higher suicide and substance abuse rates than straight kids. High school is tough enough without the added discrimination that gay kids experience.
I remember 12 years ago coming home from work when my kids and some neighbor kids were running around and rough housing on our front lawn jumping into piles of leaves. One kid got hurt, and some shoving and pushing started, and my son, Ryan, who must have been about 5 at the time, got mad and was screaming/crying at another kid "You faggot!!"
I called him over and told him not to ever say that word again, that it was a bad word, like "Nigger" or "Spick". Ryan looked at me confused. He didn't even know, of course, what the word meant, and it's origin as a hurtful epitaph. I realized then how deeply engrained, and taken for granted, homophobia and discrimination is in our society.
Kudos to Carolyn Laub who started the Gay-Straight Alliance in California about 5 or 6 years ago. It has grown from 50 to 350 schools in the network in the last 5 years.
Check out their web site at the link below. They have a lot of great materials.