At the beginning of this activity I take about 10-15 minutes to have a class discussion on the vocabulary: System, Organ, Function, Structure and Classification. Oftentimes I have found that students can name some organs within a system,like the stomach to the digestive system, but they don’t really know how to assess why. So we discuss. We spend a few minutes really talking about function using examples like a pen, pencil and marker all having the same function, “to write” as a basis of understanding. We discuss how verbs are used to describe actions which are functions. As they look for functions they should be exploring verbs (or actions). I also discuss that while all organs are structures, not all structures are organs.