A few things.... 1 Make your chapters longer I had the same bs fed to me by the Spoonful's by my teacher too "don't want too many pages in each chapter, because then you're just going to lose your reader."
For starters what would you classify as enough? You cant, what your teacher said and mine is a bunch of crap, that has no proof and is opinion no fact. A two page chapter is not losing the reader.
Make a chapter as long as you think it needs to be.
Anyway, when is this series going to be typed up?