There is a world of difference between telling you to 'look for ii V I progressions and handing you a list of tunes or copy of the progressions. Did he know ahead of time this was going to be where the discussion lead? (BTW, finding ii V I progressions in the Read Book is a lot like finding sand in the desert) Private lessons are very different that following class instruction, and you should know that. Working with one student will often include a discussion that leads to things neither student or teacher could predict, and a good teacher will see a 'teachable' moment, and not shy away from it because they aren't totally prepared. Are you prepared for your lesson with a mindset to learn, or are you more ready to show?