This is an easy-to-read chart that transposes pitches of band instruments.
The keys are C, Bb, Eb, and F.
You can keep this by your podium, keyboard, or blow it up into a poster. Students may also use it as an aid if they are transposing.
The notes are given with their enharmonic equivalents, but there is a chart which lists the sharps first and a second chart that lists flats first, depending on your personal preference.
Do your students need a fun way to assess scales?
Check out my Weighted Scale Spinners