I am Baptist and I have heard Baptist Ministers address the subject by simply calling it what they believe it is - a sin. Just like any other sin. They do it without getting into any seedy aspects of homosexuality, they are preaching to adults and adults know what homosexuality consists of.
Teaching children would be a little more difficult and would require a lot of parental input in my opinion. On second thought a church class to give helpful ideas to parents might be best and then the parents could teach their own children only when they deem the child to be ready and only in terms the parents are comfortable using with their child.
No kidding. As an ex-Sunday School teacher, I used to get REAL nervous when Sodom and Gomorrah would come up in the schedule.