To do this you need to work with a Christian organization in a local public school such as FCA or First Priority Club, it also helps if the school has a family atmosphere… such as small size and Christian faculty…
The concept is to reach kids where they are, without fear of embarassment. What I was allowed to do at school as FCA President, was put up a “prayer request box”. This is a metal box that is on wall, where anyone can drop in prayer requests on small slips of paper, and drop them in a locked metal box.
At the end of each day, myself or one of our FCA Leaders takes out all slips. Then we have a weekly meeting to pray specifically for each person on the slips of paper. It has worked awesome so far!
People probably won’t disrespect it, cuz they have an automatic respect for what it is… prayer.