Are math tests getting you down? Do you freeze up when you are asked to factor? Welcome to the De-Stress-Pen.  The stress pen is a biofeedback device that measures signs of stress such as clammy or cold hands.  Embedded within the device are humidity and temperature sensors (strategically placed for both left and…

Object: Pen for standardized testing

Twist: It tells you when you need to relax

Big lessons:

1. You can make your own sensors.  See http://www.gogoboard.org/node/12 (thanks Claire)

2. Heat guns can be used to adjust polymer vacuum casts but is best done as a two-man job (thanks Alicja)

The spoon is out.  A pen that tells you to chill out is in.  This morning I was given a ruler and stress testing card that is…