Good story! Exposition is short, but really, it's pretty refreshing to have a self-contained Chapter 1 for a change. Only thing I would say is that there is little sense of scale from the shrunken teacher - and the "panicked ants" imagery works except that there is no one really seeing them as ants. The strength of unaware stories is the contrast of perceptions - we get that she is powerful, but it is conveyed by the repetitive act of her crushing the students with no real differentiation between the seperate acts (the teacher was a good one). You don't want to get into a "and then she crushed him. And then she crushed him."

 I like your style, though! You write well, and I really like the sense of despair you evoke in the protagonist.

But wait! You've taught us to believe there is no hope for him in this world! What's going to happen? Oh man!

Good stuff. Really interesting mileage you're getting out of these characters.  I 'unno. You've layered the stories well. It's a surprisingly textured world, it feels lived in by now, by these two strange people we've come to know pretty well. Now a third! (Ah geez, but who is this strange stranger? What doth this portend for weary Jack?)

Anyway, good writing. Got a lurker outta hiding, if that means anything. Keep on doing whatever it is you do, s'workin', and there are some embarrassingly rapt audience members out here.

Your stories are so joyful and your characters are so much fun. Really excellent stuff!