April Fools

So how many of you are planning to fool your students tomorrow?  My students always seem to love April Fool's day, and to be honest I have fun with it too.  One of my favorite tricks is my special timed test.  My class takes a 20 question, 1 minute timed multiplication test every morning, and tomorrow there will be a few surprises on the test.  It will look like the test they take everyday, but as the problems progress I've thrown in surprise problems.  I did it last year and some of my students thought it was hilarious-after they figured out that it was a joke.    I've attached a copy of our test, which is nothing special at all, but I wanted to share.  I'd love to hear your ideas!

Timed Test