Back Squat 5-5-5-5-5 reps.
Two minutes of cardio (your choice), samson stretch, CFWU x 3 (x 2 if in first two weeks of WODs)
Use a pvc pipe or broomstick to practice the form on these. If you have access to weights, begin with a light, empty bar. Take two to three minute breaks between each set to allow glycogen replenishment of the muscles. This is not done for time. You are going for your five rep max (5RM.) Make sure you only count reps where your hips go below parallel.
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Introduction to the Low Bar Back Squat, Mark Rippetoe
Video courtesy of CrossFit Headquarters