Summary Compare the skeletons of different animals and find the homologous bones in them. Science content Biology: Features, Adaptations of Living Things (K, 1, 3, 7) Biology: Classification of Living Things, Biodiversity (1, 3) Biology: Evolution, Natural Selection (7) Lessons activity is in Bones and the Skeletal System Animal adaptations for Primaries Materials skeletons of as many animals as possible, real or drawings, assembled or in a pile Procedure Lay out the skeletons and skeleton images. I use a deer skeleton just assembled by the class, a snake skeleton (in a display case), mouse skeleton (a jumble of bones in a magnifier box, and one femur leg bone in its own box). Ask students to find the same bone in the different animals. Grades taught Gr 1 Gr 2 Gr 3 Gr 5 Gr 6