For those of you teaching Algebra 2, skip to 14:29. There's a great problem in there. Namely, if you recruited 5 people and they recruited five people, how many cycles would it take for everyone on Earth to be a distributor of Herbalife? This would lead be a prime example of a good task to require students to use the 4-fold method of representing the phenomena.
       The follow-up segment on the toll Herbalife has taken on Latino families offers a prime opportunity to make this problem real to many of our students.