You can practice these scales over this backing track:
A Minor Pentatonic (A C D E G)
A Blues Scale (A C D Eb E G)
This is the chord sequence:
||: A5 | C5 | D5 | F5 G5 :||
This one is inspired by the final section of the song "Love of my life" by Carlos Santana.
You can improvise with the B Natural Minor Scale (B Aeolian).
I recorded this video using this backing track during one of my lessons.
|| C7 | F7 | C7 | C7 |
| F7 | F7 | C7 | C7 |
| G7 | F7 | C7 Am7 | Dm7 G7 ||