Pi
not me, but I had the same teacher, and can confirm his uselessness.

Back at school a physics class a couple of years above mine were doing some calculation or other involving pi. The teacher was basically trying to prove the calculation. In order to achieve this wonderous feat he decided that rounding pi to equal 4 was accurate enough.

No wonder my physics set basically took it upon ourselves to learn what we needed to, teacher in question didnt stay very long at the school
(spool32 k-rap remixer - wit me day saver, Fri 7 Jan 2005, 20:34, Reply)