10 X 100 m sprints

 "Teach yourself by your own mistakes; people learn only by error." -- William Faulkner

Entire PE class did:

60 sec rest in between

I did with 90 secs rest in between.  They were destroyed, I was nearly. 

Shopping for the week?  What to buy...

http://www.crossfitverve.com/crossfit_verve/2011/10/monday-112410.html