Track #5: A-C#-E-Em
I-III-IV-iv; turnaround = I-V-I-V
Track #4: A-B-D-E
More Key of A Major Chord Progressions
Track #3: A-G-D-E
Track #2: Bm-E-A
Track #1: A-C#m-Bm-E
For these key of A Major tracks, try these scales:
A Major: A, B, C#, D, E, F#, G# (the notes in white boxes)
A Major pentatonic: A, B, C#, E, F# (the underlined notes)
See these scales with a Fretboard Toolbox:
All of this page's Tracks on Shuffle!
Track #6: A-C#(7)-F#(7)-B(7)-E(7)
I-III(7)-VI(7)-II(7)-V(7); turnaround = I-V
Now see how many of these chord progressions you can play along with when you don't know which track is coming up next! Use the Roman numerals that show up in the audio player as your clues & practice learning those Roman numerals here!
This is where you really start going a long ways towards training your ear and building the muscle memory you need to play songs "on the fly"!