This unit contains the words and clipart needed to create a graphic organizer to generate ideas or share what students already know about sources of light. It can be used to brainstorm sources of light. Clipart and words are included for sources of light such as bulb, firefly, lightening, siren, etc. There are also words included for the outside of the circle which tell how students know what they know. For example: family, friends, self, books, etc.