Chalkboard jokes

Your hairline is so far back that when I wrote it on a chalkboard, it did not erase.

A teacher is teaching a class algebra. Timmy, you've worked out it is AK, but what is 59 minus 12? Timmy shakes his head, not knowing. The teacher asks, "How about AK 49 minus 2?" Timmy replies with um... The teacher becomes frustrated and yells, "What comes after AK, Timmy!?" The white kid at the back stands, shouts 47, and pulls the trigger.

What is black when it’s clean and white when it’s dirty?

Answer: A chalkboard.

I'm a big fan of white boards; they're remarkable.

Wow! That whiteboard is remarkable!

I am a big fan of whiteboards. I find them quite re-markable.

Of all the inventions of the last 100 years, the dry erase board has to be the most remarkable.