Key Signatures Practice for RCM Level 5

A key signature is a group of sharps or flats written at the beginning of a piece of music, right after the clef. It tells performers which notes are always sharpened or flattened throughout the piece, so composers do not have to write an accidental on every affected note. Key signatures define the tonal centre — the key — that the music is built around.

At Level 5, you are expected to know major keys with up to four sharps and four flats:

• Sharp keys: G major (1♯), D major (2♯), A major (3♯), E major (4♯)
• Flat keys: F major (1♭), B♭ major (2♭), E♭ major (3♭), A♭ major (4♭)
• No sharps or flats: C major

Every major key has a relative minor that shares the same key signature. The relative minor starts on the 6th degree of the major scale — three semitones below the major tonic.

• C major → A minor (no sharps/flats)
• G major → E minor (1♯)
• D major → B minor (2♯)
• F major → D minor (1♭)
• B♭ major → G minor (2♭)

Two classic mnemonics help with the order of sharps and flats:

• Sharps appear in this order: F C G D A E B — remembered as "Father Charles Goes Down And Ends Battle."
• Flats appear in the reverse order: B E A D G C F — "Battle Ends And Down Goes Charles's Father."

The name of the major key for sharps is one semitone above the last sharp written. For flats, the key name is the second-to-last flat (except F major, which you memorise).

• Write out the circle of fifths by hand a few times — the visual pattern reinforces the relationships.
• Practise matching a key signature to its name in both directions: given the key, write the signature; given the signature, name the key.
• Quiz yourself on relative minors separately until they feel as natural as the major keys.
• Use spaced repetition: revisit topics after a day, then a few days, then a week.