I doubt that my 15-year-old daughter has a boyfriend in school, but she is hiding it from me. While don't have a problem with it, am worried she might do some wrong things due to lack of guidance. how do I break the ice with her?

I suggest, take her out, preferably to an open place, like park or go for a long walk with her and bring the topic up in a tone that is not apprehensive. Tell her you know that she has a boyfriend and that you would have felt nice if she had told you rather than you finding out. Tell her that you trust her and you will be by her side in the choices she makes because you trust her and know that she will always live upto her values. You can go through this article, may be of some help. http://www.professorshouse.com/family/children/articles/daughters-first-boyfriend/