Study after study shows that the vaccine does not stop people from getting Covid. I’m addition, studies show that the viral load of a vaccinated person for SARS-CoV-2 can be higher than an unvaccinated. Some may argue that it’s FDA approved however, the vaccine that is being used now (to include the Pfizer) are all used under the EUA. 
furthermore, the risk of myocarditis is significantly higher in young males ages 12-17 and hospitalization has been needed in 86% of cases for those. Kids ages 0-17 have recovered very well from Covid even if they got it. There is no reason to mandate such a controversial vaccine. You may argue we have vaccinated for years. Yes we have, however other vaccines like measles are procen to work, and one you have had it, the chances of getting the disease is much less. Our kids should not be a victim of this political climate.