A selection of music worksheets : free for personal and educational use.
Some of these worksheets will be instrument specific, but most of them are general music theory. Please email me firstname.lastname@example.org if you have any questions or requests.
The Circle or Cycle of Fifths
Relevant to all musicians, this handy 1 page PDF shows the pattern of the major and minor keys, number of sharps or flats, and gives their key signatures.
Includes a mnemonic for the order sharps and flats appear in key signatures.