Making an arrangement using two or more kinds of branches only.
My classmates' criticism today was that my arrangement looked pretty at first glance, but then you discovered its shape, leaf size, and branch characteristics were too similar (I used a Snow fountain cherry and Red currant--both branches have berries, another one is Crape Myrtle). Now, I certainly understand that it's important to pick branches that contrast with one another, emphasizing their uniqueness. It's a good lesson. (5/18/10)