In a half hour I'll be attending my last math class as a student, possibly for the rest of my life here on earth. (Yes, I am certain there will be math classes in Heaven. It's gonna be a party--me and my teachers, Galileo, Newton, and Pascal.)
Anyway, in honor of this passage from student to hopefully-teacher, I thought I'd share this little image with you that I like to share with my College Algebra students on the first day of class. If you can find the error, you get a gold star!