Students must also understand it's value and not treat it like they are backup for the Beatles.
But a good tambourine is only as good as the teacher making sure the students know how to play it correctly. I've seen many concerts where I was ready to run on stage and start a masterclass on the small percussion instruments.
Triangle, crash cymbals, tambourine, claves, maracas, and most other handheld percussion instruments have very specific techniques. They are often overlooked by the percussionists as not as sexy as snare drum, because they all aspire to be "drummers" and not percussionists. Emphasize that all percussion instruments are solo instruments that must be treated with appropriate importance.
Imagine that you saw a trumpet being held incorrectly and using the wrong hand to play it. Meanwhile, the student is resting it on the stand or their leg because its more "comfortable." You would not tolerate it for trumpet or any other instrument, so why tolerate it for percussion.
Do your research on the proper techniques for each percussion instrument. Your percussion will sound better. Which will make your band sound better.
Percussion is the most difficult, complex, and diverse thing we ask band students to do. Change my mind.