Eddie Lewis is available to direct trumpet sectionals at your school. He’s been doing this sort of work since the early 1980’s.
Eddie’s approach to sectionals is to first work on the music that the band directors want the students to learn. But then, beyond just that, he teaches the students in a way that helps them play better as a section in general. This means that what he teaches them on their current music also carries over to the music they will play, as a section, on future performances.
When time permits and when it is appropriate to do so, Eddie incorporates listening games into the sectional. The students enjoy the “exercises” and it encourages them to grow their ears and help them play better, as part of a team, performing as one.