I don't think you've ever seen a child in Anaphylactic Shock if you think all you need to do is train the child to use a vial and needle. Even training school personnel is not a great idea - While an ER nurse or paramedic can handle it because they give injections every day, a teacher or even a school nurse may go for years without ever needing to do an epinephrine injection and the stress and inexperience may make them unable to perform under pressure of having a child dying in front of them.
An IM injection is easy to do when you're calm, but just filling the syringe can be difficult when you're under intense pressure.
An IM injection is easy to do when you're calm, but just filling the syringe can be difficult when you're under intense pressure.