This is a lesson about the size and scale of planets in the solar system. Learners will kinesthetically model the order of the planets outward from the sun. Then they will use a string and beads to create a model to represent the relative distances... (View More) between the planets. Finally they will explore another model (using a beach ball for the sun) to discuss relative size of the planets to the sun. The lesson uses the 5E instructional model and includes teacher training, pacing guides, essential questions, a black-line master science notebook, a student presentation booklet, supplemental materials, and vocabulary for both students and teachers. This is lesson 1 of the Mars Rover Celebration Unit, a six week long curriculum. (View Less)