A relatively new unit that looks at alternate ways to exercise through methods of High Intensity Interval Training
http://library.crossfit.com/free/pdf/CFJ_Trial_04_2012.pdf
http://library.crossfit.com/free/pdf/08_03_Better_warmup.pdf
http://library.crossfit.com/free/pdf/Foundations.pdf
How to effectively execute a squat
http://library.crossfit.com/free/pdf/CFJ_SquatClinic_Dec02.pdf
http://library.crossfit.com/free/pdf/12_03_Wallball.pdf