This document is ideal for when you are looking for an introductory lesson, an extension activity or a hassle free substitute lesson. Also suitable for Home-schooling. The document provides background information and visuals on Eclipses along with a supporting worksheet which challenges the student to expand on the information provided. Print friendly for ease of copying, this document can simply be handed out to students and requires no explanation. A great resource to have at the ready for when illness strikes and you are understaffed.