Bird Bones vs. Cow Bones
Purpose: The purpose of this lesson is to help children discover what adaptations  birds have that allow them to fly.
Objectives: After this lesson the student will be able to:
? Distinguish between a mammal bone and a bird bone.
? Describe the characteristics of a bird bone that allow it to fly.
? Draw a cross section of a bird and mammal bone.
? Apply information to new situations.
Materials: Seven  chicken leg bones, seven cow leg bones (all baked and cleaned), a  variety of feathers, scissors, and the Bones and Feathers Observation Sheet.
Prompt: Question on board: How come cows can’t fly??
Procedure: Teacher will start by asking the question, “ How come cows can’t fly?”  The students will then by placed in prearranged learning groups and the  materials for the lesson will be handed out at this time. The students will be  given 15 minutes to observe the bones and feathers , and to complete their  observation sheets.               Closure: The group will then come back together to discuss their observations, and  to answer the question as to why cows can not fly. Students will also  update their classification charts.
Assessment: The conclusion section of their observation sheets.