A kindergarten class had a homework assignment to find out about something exciting and relate it to the class the next day.
When the time came to present what they'd found, the first little boy called upon walked up to the front of the class, and with a piece of chalk, made a small dot on the blackboard, then sat back down.
Puzzled, the teacher asked him what it was.
"It's a period," said the little boy.
"Well, I can see that," she said, "but what is so exciting about a period?"
"Darned if I know," he said. "But this morning my sister was missing one, Daddy had a heart attack, Mommy fainted, and the man next door shot himself."