I hope your teacher, if you have one, does not expect you to be able to play the WHOLE range of the horn. That is an absurd task for a person who has been playing only but 3 months. Me, being mostly self taught, did not learn the full range until I entered my freshman year of high school. Partly because, I did not have the knowledge of my range. My middle school band director gave me music, and I played it, nothing more. The band director I have now showed me how to understand music, introducing me to music theory. He could not however show me the right technique. He is a woodwind player. I cannot level with the other people here because I came a few days or so after 'hitman.' I can however in a sense get on the level with Mason, I struggled, but I got through. I picked up my Arban's and I got some music theory books. He may be struggling, or pulling our legs. I have yet to decide.