Here are ideas from Tamera Kraft
http://revivalfire4kids.com/2013/09/04/planning-see-you-at-the-pole-for-childrens-ministry/

Careful navigation with authorities is a must. Might be different in different communities. Students have a right to appropriate religious expression, but somehow some school systems are afraid at least for peaceful Christians to assemble. Others say only students and not “outside” adults — as if parents were “outsiders.”

Comments?