I have a suggestion. I've only tried a few of these exercises, so some might do this, but none of the ones I've tried. Why not give extra hints within the track, either by adding a section before the exercise, talking and/or using the lyrics track to give extra information on strumming patterns (down, up, up, down, up...) or pointing out difficulties or just the intention of the exercise? This would make it more of a lesson than an exercise. Are there any that does this? Creators and users reading this, what do you think?