Use this as a basis to compile sample activities to do with students to conserve the Earth, these include: plant a tree, recycle, turn off the lights, and clean up trash. The others are good ideas to simply introduce the students to.
Earth Day Coloring Pages collection of Free Earth Day Coloring pages including printable earth pictures, planet earth coloring pages for Earth Day
Planet Earth - Lift-the-flap printable template FREEBIE. A nice simple Earth Day project.