Personal contacts tend to be more informal and tend to be more invitational of the questions from the non-Muslims. It is advised that brother work on the non-Muslim boys and likewise sister work on girls. And when the questions that do crop up from their peers should be dealt with in a very concise and eloquent manner. Doing this would require some basic knowledge on the part of Muslim students. All students should obtain the ways to explain these topics through their study Circle, by reading articles in Islamic magazines, videos, lecture and through experiences of other students.
Muslim students are highly encouraged to become writers and editors of their school papers.
Inform the writing staff to consult you before publishing articles on Islam and Muslims. Being a writer will give you ample opportunity in providing Islamically inclined articles which will insha Allah open the hearts and minds of its readers. As a group the Muslim students should try to contribute an article on Islam in each issue of its paper. The school may not allow you to preach in the school paper, but Al-Hamdullah there are way to circumvent this problem. Thus you are still exposing an aspect of Islam without coming forth as a preacher.