This formative assessment probe originally appeared in Uncovering Student Ideas in Science (Keeley, P., F. Eberle, and C. Dorsey. 2008. Arlington, VA: NSTA Press ). In this Science and Children article, Page Keeley outlines various ways it might be used in the classroom to identify and correct student misconceptions and to promote discourse. This probe asks students to identify organisms that have a life cycle from a list of plants and animals. Through class discussion, students discover that all of the organisms have a life cycle.