Earth Day, celebrated on April 22, is the new name for the former holiday called Arbor Day. Arbor is the French word for tree. Earth Day is a global celebration that focuses our minds on caring for our earth. Ironically, some Earth Day activities are not really green. Printable for Earth Day, such as coloring pages and worksheets generate more paper waste. I include myself in this indictment because I've written articles for free printables for Earth Day. Here is a truly green lesson plan which is safe for our earth, educational and enjoyable for students of all ages.Free Earth Day Lesson Plan