The Discover Music Poster Set is by far one of the best classroom poster sets I have ever seen. I believe my middle school band director used them, and I have known other teachers to use them as well. It is also available from other websites like Music in Motion.)
I like these particularly for several reasons:
- They do not try to cram all the basic music theory onto one poster! There is a separate poster each for dynamics, symbols, tempo, time signature, music alphabet, rhythm, articulation, and one final poster of a piece of music combining these things.
- The posters are bright and colorful, but not too busy.
- The images are arranged in ways where the concept can be grasped quickly, such as categorizing dynamic levels with color and height, or lining up the notes and rests that get the same number of beats with each other.
- They are smaller and can be posted in multiple areas around the room.