Making sense of conversions

My son, Jared, is in 6th grade.  He has told me he thinks it’s “cool” that I’m teaching 6th grade too.  According to him, we have stuff to talk about.  I can finally help him with his homework.  (Really?  Like I’ve never been able to help you with any of your other homework?!?  What the what?!?!?).  Of course I left …