I designed a Master Note Reader card for 4th and 5th grade to post on a bulletin board once they reach a certain goal, which I have yet to decide. It is business card size. It works wonders and kids are so motivated by earning this card. You could give it to students or post on a bulletin board as they earn them and then send them home when all have earned it. I have edited this to now add more grades.
Also Check out my Zombie Note Attack packs that has lots of note reading tools, plus zombie master note reader cards.