Hey guys. I am working through some pages my friend copied(shhh!) for me from a ii-V-I book. There is a section for both treble and bass clefs which is nice. Each section starts out by showing the scales for ii-V-Is in all keys, and then has a collection of licks that work well in each key. I just started looking at the scales given, and noticed that in all of the minor ii chords, the 6th is a major one. ex. in the key of C, d minor is the minor two chord. It is notated with no key signature and the dminor scale has a Bnatural as the sixth degree, whereas in d-minor, where as it should be a Bb. This is the same for all of the examples, major 6ths instead of minor. Is this common practice for jazz or ii-V-I, or is something funny here?