Trombone
Baritone Horn
Euphonium

The trombone, baritone horn and euphonium in a brass band read their music in transposing treble clef. Their sheet music looks very much like trumpet music, and has a similar note range. If you need to transpose parts for students playing these instruments, you need to take it up a tone and move into treble clef. 

Otherwise, sheet music that is in B flat treble clef will work, such as Baritone/Euphonium TC, Tenor Saxophone (although you may need to take some down the octave), and even Bass Clarinet.