"Life's Calling"

When I was a high school senior, I saw an
inspirational ad on TV about becoming a teacher.
I called the number shown: 800-45TEACH.

After a woman answered, I babbled on about how
I thought I had found my life's calling and could
she send me some information.

She asked me what number I was calling. After I
told her, there was a long pause.

Then she said, "You misspelled TEACH."