One of the first things I teach in math is the concept of time.  Specifically, I teach the meaning of a.m. and p.m.--ante meridiem and post meridiem.  Getting an 8-year-old to pronounce these phrases is somewhat  of a challenge...

Mrs. B:  So, yesterday we learned what a.m. and p.m. stands for.  Does anyone remember what that is?

Madeline:  I do!  It stands for ante mnem-mnem-mnem.