Minor Scales - Natural, Harmonic, and Melodic

https://www.youtube.com/watch?v=Q7WqKpD7w4Q

How to Master the Circle of Fifths and Your Key Signatures in One Easy Lesson

https://www.youtube.com/watch?v=1swhMTSFayI

Music Theory made STUPIDLY easy - PART 1 - Notes, Chords and Melodies

https://www.youtube.com/watch?v=rZr5k1_9Dds

Music Theory Net

Music Theory Net has some good test for theory learners:


To test your Key Signature Identification:

https://www.musictheory.net/exercises/keysig


To test your major scale:

https://www.musictheory.net/lessons/21

Play With Your Music Theory: Advanced White Key Wizardry

https://www.youtube.com/watch?v=DMbbj6y_gFU

Learn Piano Scales: Major, Natural, Harmonic, Melodic Minor & Chromatic Scales

https://www.youtube.com/watch?v=aClctmxVMDU

Music Theory 101: Part 1 of 2 - Identifying Notes and Scales

Listen to the listen to the last part on Major and Minor scale.

Method to remember numbers of # Sharp in Major scales

Just see the number of sharp of based on the shape and strokes of the letters:

C = 0#    C look likes 0
D = 2#   D is 2 strokes
E = 4#    E is 3 strokes
F = 1b  (F=Flat)
G = 1#   G in type script is 1 stroke
A = 3#    A is 3 strokes
B = 5#    B can be broken into 5 artificial strokes


From Major to Minor scale, subtract 3:

Major     Minor

C = 0     c = 0 - 3 = - 3 = 3b   (BEA)

D = 2     d = 2 - 3 = - 1 = 1b   (B)

E = 4     e = 4 - 3 = 1 #

F = 1b    f = - 1 -3  = - 4 = 4b  (BEAD)

G = 1    g = 1 - 3 = - 2 = 2b (BE)

A = 3    a = 3 - 3 = 0

B = 5    b = 5 - 3 = 2 = 2#