Lesson Summary Students investigate how different arrangements of wheels and axles roll down an inclined ramp.  Students are given several challenges where they to try to create wheel systems that will perform specific tricks. Teacher Background During this lesson, students discover that wheel and axle systems of different sizes roll toward the smaller wheel.  This is knowledge students will transfer to the next lesson in the Rollers investigation. Set-up/Management Tips You will need 50 minutes to teach this lesson. For this lesson you will be introducing materials at different times for different challenges.  In order for students to have multiple experiences it is important not to pass out all materials at once. Before class have chart paper ready for recording content chart items. Literacy Support Books Available Through VAST Mediagraphies: There are currently no VAST Mediagraphies listed for this unit.  Science Stories There are no Science Stories with this lesson. Scientific Vocabulary The following words are key vocabulary words that will be introduced in this lesson and reinforced throughout the unit: Roll Wheel Axle Slope Ramp