On the bright side, I did get my kids with a great April Fool's joke.
I had my kids take out pencils and paper for a "pop quiz". I kept prolonging giving the questions (I was going to read the questions) by asking "Did you write your name at the top?" "Does everyone have a pen?" "Can everyone hear me?" And then I said, "Question 1... What day is today?"
One of the girls in the class said, "April Fool's Day!" while everyone else was writing "April 1st" on their paper.
I said, "Gotcha!"