This lesson plan was designed for my Algebra class to celebrate Earth Day through the discovery of the Fibonacci Sequence and the Golden Ratio in nature. This file includes a lesson plan and activity/lab worksheet. This was rated as an Exemplary Resource on New York City ARIS. New and Improved: Aligned to CCSS, Guiding Questions, Solutions added to the lab CCSS.Math.Content.HSN-RN.B.3 Explain why the sum or product of two rational numbers is rational; that the sum of a rational number and an irr