I put these together for my own use but they might come in handy for others. A couple of quick reference sheets, one on the modes of the major scale and the other on scale construction (major, minor and pentatonic).
To labour the point, these aren’t teaching materials, there’s no explanatory text and they won’t make much sense unless you’ve already studied a bit of music theory.
There’s always the Music Theory for Harmonica Players series on this website (still slowly ongoing) if you want to dive into this stuff. Of course you can always contact me for private lessons if you want to be guided through it.