Diatonic Scales
Welcome to Diatonic Scales :) I find it good to practice the Diatonic Scales in the order of the Circle of Fifths it really is how things move in music theory and it is good to train your ear to the sound of things moving in fifths and fourths.
All the Diatonic Scales training videos below are in the same order as the Circle of Fifths. Starting on the C Major Scale and ascending by fifths (clockwise) C Major, D Major, A Major, E Major, B Major, F# Major and C# Major. Starting back at C Major and descending by fourths (counter clockwise) C Major, F Major , Bb Major, Eb Major, Ab Major, Db Major, Gb, and Cb Major.
I've used numbers instead of note names on the pianos on the Diatonic Scale videos. There are only 7 notes in a scale numbered 1 thru 7 as shown in the Diatonic Scale videos the notes can be the tonic or root of 7 Diatonic Chords that can be used to play any song in any key! please have a look at diatonic harmony to see my 7 chord finger shapes on guitar to play any song in any key video also to learn more about the music theory numbers system please have a look at my Diatonic Harmony chart here.
All the Major and Minor Diatonic Scales from the Circle Of Fifths.
C Major

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On the left is the Key Signature and on the right the notes on a piano.
How to play a C Major Scale on a piano.
G Major
Here is The Major Scale WWHWWWH in the key of G. There is 1 sharp in the key of the G Major Scale F Sharp.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a G Major Scale on a piano.
D Major
Here is The Major Scale WWHWWWH in the key of D. There are 2 sharps in the key of the D Major Scale F# and C#.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a D Major Scale on a piano.
A Major
Here is The Major Scale WWHWWWH in the key of A. There are 3 sharp in the key of the A Major Scale F#, C# and G#.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a A Major Scale on a piano.
E Major
Here is The Major Scale WWHWWWH in the key of E. There are 4 sharps in the key of the E Major Scale F#, C#, G# and D#.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a E Major Scale on a piano.
B Major
Here is The Major Scale WWHWWWH in the key of B. There are 5 sharps in the key of the B Major Scale F#, C#, G# D#, and A#.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a B Major Scale on a piano.
F# Major
Here is The Major Scale WWHWWWH in the key of F#. There are 6 sharps in the key of the F# Major Scale F#, C#, G# D#, A# and E#.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a F# Major Scale on a piano.
C# Major
Here is The Major Scale WWHWWWH in the key of C#. There are 7 sharps in the key of the C# Major Scale F#, C#, G# D#, A#, E# and B#.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a C# Major Scale on a piano.
F Major
Here is The Major Scale WWHWWWH in the key of F. There is 1 flat in the key of the F Major Scale B♭.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a F Major Scale on a piano.
B♭Major
Here is The Major Scale WWHWWWH in the key of B♭. There are 2 flats in the key of the B♭ Major Scale B♭and E♭.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a B♭Major Scale on a piano.
E♭Major
Here is The Major Scale WWHWWWH in the key of E♭. There are 3 flats in the key of the E♭ Major Scale B♭, E♭ and A♭.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a E♭Major Scale on a piano.
A♭Major
Here is The Major Scale WWHWWWH in the key of A♭. There are 4 flats in the key of the A♭ Major Scale B♭, E♭, A♭ and D♭.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a A♭Major Scale on a piano.
D♭Major
Here is The Major Scale WWHWWWH in the key of D♭. There are 5 flats in the key of the D♭ Major Scale B♭, E♭, A♭, D♭ and G♭.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a D♭Major Scale on a piano.
G♭Major
Here is The Major Scale WWHWWWH in the key of G♭. There are 6 flats in the key of the G♭ Major Scale B♭, E♭, A♭, D♭, G♭ and C♭.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a G♭Major Scale on a piano.
C♭Major
Here is The Major Scale WWHWWWH in the key of C♭. There are 7 flats in the key of the C♭ Major Scale B♭, E♭, A♭, D♭, G♭, C♭ and F♭.

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On the left is the Key Signature and on the right the notes on a piano.
How to play a C♭Major Scale on a piano.
By Michael Pelletier