Now I'm going to go over the B Flat Minor Harmonic scale. Let's take a look first at the notes of the scale, B flat, C, D flat, E flat, F, G flat, A, and back to B flat. When you've got the notes of the scale memorized go on over to your piano and I'll show you the fingering.
The right hand starts off on the second finger. Hit the B flat with the second finger and bring the thumb under to hit the C. From there hit the D flat and E flat with the second and third fingers, respectively. Now bring the thumb under again to hit the F key and play until you finish the scale with your fourth finger on the second B flat.
The second finger starts off the left hand fingering. After hitting the B flat with the that finger and the C with the thumb, cross over your third finger to hit the D flat. If you follow the scale up, your thumb will hit the E flat, and your third finger will cross over again. Finish the scale with your thumb on the second B flat. Coming back down the scale, do the reverse.
Next you can practice the B Flat Minor Melodic Scale.