The staff shows the 8 notes of a melodic major scale, and your task is to recognize which one it is. On easy you choose from 4 options; on hard you first pick the root note and then its accidental.
Tip: Find the tonic, then check the 6th and 7th degrees: both are lowered by a half step compared with the plain major scale, while the 3rd stays major. If only the 6th is lowered, it is a harmonic major scale; if the 7th is lowered too, it is a melodic major scale.
What is the melodic major scale?
The melodic major scale is a major scale in which both the 6th and the 7th degree are lowered by a half step. In Spanish-language theory it is called the escala mayor mixta secundaria. The pattern of whole steps (UK: tones) and half steps (UK: semitones) is W-W-H-W-H-W-W.
Unlike the harmonic major scale, the melodic major scale has no augmented second: every step is a whole step or a half step. Its upper half is the same as the descending natural minor scale.
Example: C melodic major
Start from C major (C-D-E-F-G-A-B-C) and lower the 6th and the 7th by a half step (A becomes A♭, B becomes B♭): C-D-E-F-G-A♭-B♭-C. This is the same set of notes as the Mixolydian scale with a lowered 6th.
How it differs from the harmonic major scale
The harmonic major scale lowers only the 6th, which leaves an augmented second between the 6th and the natural 7th. The melodic major scale lowers the 7th too, which removes that augmented second and gives a smoother line.
The 15 melodic major scales
There are 15 melodic major scales, one for each major key. Each one uses the key signature of the matching major key, with the lowered 6th and 7th written as accidentals on the notes.
To lock these scales into your fingers, practice them with the online metronome at 60-70% of your target tempo, raising it by 5 BPM each time you play three repetitions without mistakes. The online tuner lets you check your tuning before you start.
Printable worksheet (PDF)
The same exercise on paper, for class: eight melodic major scales written on one side of an A4 sheet, half with a key signature and half with the accidentals before each note. The name of each scale is written below it. With a separate answer sheet, with the answers in red.
It goes from easier to harder: first key signatures with few accidentals in treble clef, then more accidentals and the bass clef.

Download the worksheet (PDF A4) Answers
You may print and photocopy the worksheets freely for the classroom. There are also worksheets of this same type for writing and writing with a key signature, and in the scales index you can create custom worksheets, mixing whichever types you like.