Interested in learning the CrossFit program but don't know how to start? With the Elements class series at CrossFit Potrero, you will learn the 9 foundational movements required to be able to participate in the regular class schedule. The movements are covered in four different Elements classes. With this gift certificate you can take the Elements classes as many times as you want within a one-month period.  

http://crossfitph.com/classes/group-elements-membership-san-francisco-crossfit/