Here are some changes from the exercises in the book, The Jazzmaster Cookbook, by Jim Grantham -- Jazz Theory and Improvisation. It is a very systematic and thoughtful book, a lifetime of study. He also sells CDs in all keys with a real rhythm section playing the changes, but I thought some folks in the iReal would find these useful as a starter. The exercises make more sense when you get the book as there is chord scale theory that can be applied to each exercise.

Grantham Jazzmaster (24)

Individual songs:
Jazzmaster Workout - Tonality - Jim Grantham
Lydian Chordscale Vamp - Jim Grantham
Ionian Chordscale Vamp - Jim Grantham
Mixolydian Chordscale Vamp - Jim Grantham
Dorian Chordscale Vamp - Jim Grantham
Aeolian Chordscale Vamp - Jim Grantham
Phrygian Chordscale Vamp - Jim Grantham
Locrian Chordscale Vamp - Jim Grantham
Symetric Diminished Chordscale Vamp - Jim Grantham
Wholetone Chordscale Vamp - Jim Grantham
Melodic Minor Chordscale Vamp - Jim Grantham
Progression #1 (I - VI - II - V) - Jim Grantham
Progression #2 (Major Cycle) - Jim Grantham
Progression #3 (Blues) - Jim Grantham
Progression #4 (Minor Key Cycle) - Jim Grantham
Progression #5 (Secondary Dominants) - Jim Grantham
Progression #6 (Secondary Dominants) - Jim Grantham
Progression #7 (Secondary Dominant Cycle) - Jim Grantham
Progression #8 (Tritone Substitution) - Jim Grantham
Progression #9 (Tritone Substitution) - Jim Grantham
Progression #10 (Modal Interchange) - Jim Grantham
Progression #11 (Diminished Harmony) - Jim Grantham
Progression #12 (Diminished Reharmonization) - Jim Grantham
Progression #13 (Chromatic Lines) - Jim Grantham