I had a great professional development day at Western CT State University. I have known the professors there for some time. They are definitely people I like to work with.
I sat in three reading sessions. One for young band music, one for grades 3-5 band music and one for jazz band (level 4-5). I haven't played this much in a long time. I haven't played in a band like this for awhile either. It was a lot of fun.
I also got to sing in Kevin Isaacs choral workshop. It had about 60 teachers in the room. It was nice to sightread 4 part music and with adult voices.
Professional development should be like this. I'm wondering what other teaching discipline (K-12) does stuff like this? I know university educators need to research/publish, but I'm not sure K-12 educators demonstrate/practice their subject enough.