You are going to need a basic business license as well.
that sounds like something some vets/ vet techs already do for free. I know vets who go volunteer their time to give talks like that.
The first thing you should do is contact some schools and see if they would even be interested in this sort of thing and if so what kind of requirements the school district would have for you to be able to bring animals onto school grounds. They may require special insurance or certifications such as the therapy dog certification which approves an animal based partially on personality for the safety of people who will come into contact with it. Credentialing (if you are in a state that registers technicians you are likely not licensed...they tend to be two different sorts of credentials) for you to teach something like this isn t going to be required to talk to students about preventative care because you aren t going to really be practicing veterinary technology . However, you should check into the statutes surrounding veteirnary technology in your state as they vary and some are much more strict than others and it s better to cover your bases. You should also talk to the veterinary licensing board in your state to ensure that you won t be encroaching on the practice of veterinary medicine with any of your comments, such as recommendations for vaccination or deworming. Then check with your state about business license requirements. Another option you should look into is assisting teachers at high schools which are offering veterinary assisting certification. These teachers often have no idea about veterinary assisting and are working from a printed workbook with little to no true information or experience in providing veterinary assisting or veterinary health care recommendations. They would often be glad to have someone come in and help them with restraint labs, fecal testing labs, etc