The answer to this will depend on which state you are working in. Different states have different requirements for first aid in schools. For example in Victoria, the HLTAID012 as a unit is not recognised as meeting the requirements for first aid however as you will also be issued a HLTAID011 unit this will be sufficient. You will then also need additional training for anaphylaxis and asthma. In NSW you may require additional training in anaphylaxis.
It is important to check with your individual states education authority on which training is best for you or speak to your training provider for guidance.