I love this lab!! It covers just about everything that a 7th grader from California needs to know about light. This is a five page lab that usually takes 2-3 days to complete. You may have to change some information, such as page numbers, or diagrams to match your textbook and what you teach, but it will give you a great place to start! Enjoy! This activity supports Grade Seven California State Science Standard 6 - Physical principles underlie biological structures and functions.