As an active, practising member of the LDS Church, I'm interested in the variety of responses you've gotten to your request. Some of them seem wildly inaccurate when compared with my own experiences, such as JaniceR's suggestion that an ex-Mormon website would be more accurate or accessible than any one of the millions of members of the church. PepperlandGirl's response struck me as completely foreign and almost completely unrelated to the experiences of myself, my family or my friends.
For starters, LDS youth are teens. As such, to say that anything applies across the board isn't necessarily accurate. Teens are teens, regardless of their religious beliefs. They may be obedient or rebellious, they have differing levels of maturity, different interests, tastes, etc. Some are athletic, some aren't. Some are musical, some aren't. To assume that something as varied and individual as high school would be any less varied in the LDS segment of society would be shallow thinking in the extreme.
That said, a few basics are shared by active, practicing Mormons.
- Dating before age 16 is discouraged. (Why date before 16 anyway? What, are you going to have your Mom drive you around? Please - dating without a drivers license is lame.)
- Drinking, smoking, and drug use are all strongly discouraged. (Not to mention illegal for youth anyway)
- Sex outside of marriage is strongly discouraged. (Again, a simple guideline that makes a lot of sense.)
Naturally, being a non-dating, non-drinking, non-smoking, non-toking 15 year old in a high school that's filled with hundereds of teens who don't share your beliefs is a challenging experience. There's pressure to date early. There is alchohol and drug use at most parties, so you generally don't go.
Oh, and let's not forget the kids that go to other churches who want to 'save you' because you don't believe in Jesus, being Mormon and all. Except that you do. Does the name 'The Church of Jesus Christ of Latter Day Saints' not indicate that? And how would that kid in your Biology class know what you believe anyway?
Somewhere between the social akwardness of living your values and the bizarre misconceptions people get about our faith, it's really easy to 'stick with your own'. Also, LDS teens, like any other group, can be a pretty social bunch. So we'll have our own dances where we don't have to worry about people making out in the corners, or dancing like strippers or spiking the punch.
We also have an active youth program that includes a lot of activity during the week. We have youth activities weekly, Seminary daily (usually in the early morning, before school), and go to church on Sundays. Needless to say, that takes some time, especially on top of a busy academic load.
Basically, teen life in the LDS church is just teen life minus sex, drugs and alcohol.