PTO Today

we are looking for ideas for high school age (gr 9-12). hot topics are bullying (physical, verbal and cyber); we are also looking for assemblies for seniors on such topics as binge drinking and also compulsive behavior (like drinking, drugs, or gambling...poker is really big right now!).
Has anyone brought a low cost (or no cost) assembly to a high school thru a PTO? We are a new organization in MA and are a non-fundraising PTO.