Marbles

Mrs.Norris and her kindergarten class were looking at a book of pictures starting with "m". One of the pictures was children playing marbles.

Mrs. N:  "You probably don't know this game. I played this a long time ago when I was a little girl. It's a game called marbles.  (She then explained the game to her class.)

Student: "Do you still play?"

Mrs. Norris:  "No.  Not anymore."

Student:  "Why did you lose all your marbles?"

 Little does she know that's how A LOT of teachers feel after the first week of school.