Subjective value

**One of my students tried to trade me a pack of Midol for a calculator**

Me: "I need something valuable for my calculator."

Student: "Oh this IS valuable."

Me: "But not to me...."

Ye Olde Calculatore

Student 1: "Can I have one of the big calculators?" (A graphing calculator.)

Me: "So you want a giant wall mounted calculator where you have to push buttons with both hands?"

*About 15 minutes later*

Student 2: "Can I have one of those big old calculators?"

Me: "You want giant buttons and some kind of gear mechanism to actually calculate something?"

Hang on to the calculators.

Since there is no school for the rest of this week I will be revisiting some events that happened last year.

*student drops a calculator on the floor*
Me: This is why we can't have nice things.
Student: I thought it was because we don't have any money.