My son has a teacher and I do plan to ask her this question, but I also wanted to ask it of those that specialize in trumpet. I feel like multiple input is very helpful since I am dealing with a rather unique five year old. I have been working through a beginner book with my son. If we come to a song that he has not learned the note for, we stop and learn it. He can play his C scale and down to f#. This week he wanted to learn a song that included high D & E. Is there any harm in me teaching him the fingerings to these higher notes? He wants to play America the Beautiful and has managed to play much of it by ear, but was stuck by the notes he has not yet learned. I found a version online, but since it includes high E, I don't want to cause harm if that is possible in him playing too high too soon. Any thoughts?