I'm learning to play a trumpet with guidance of a private teacher. He is busy person, so we have lesson once a fortnight.

Now I:

 1. **Learn instrument** for about a year
 2. **Have basic knowledge of music theory.** I understand chords and octaves structure, though if one shouts "Quick, sol flat minor", it will take me a couple of minutes to build it and another couple of minutes to actually play it on trumpet
 3. **Train ear** with app on my phone. It goes surprisingly good, in a few weeks I was able to recognize tones in major scale.
 4. I play in a small *'band'* with guitar, bass and drums, we sometimes play 1 hour concerts in local bars. All four of us are in nearly the same level. 
 5. If it is meaningful, I have really modest skills on guitar and bass guitar.

Though I think it is not **that** important(though still important), whether you studied in some institution or by yourself, subjects that are taught in institutions are taught for some purpose and I feel like missing somthing. Also I would like to understand musicians better.

So, what are the crucial parts of institutional musical education, which non-instituational learner misses and where can I get them by myself?