Sometimes little mistakes are fine. But some others are inexcusable... Post below some of your WORST spelling errors you have said or seen.
I remember one time, my art teacher was announcing the art show for the year, and she spelled "annual" as "annal," so one of my brother's friends walked up and erased an "n." Then she asked this kid to read it out loud and all you heard was, "THIRD ANAL ART SHOW!"