Mel D has a super cute Lorax activity for free on TPT!
I love this art activity with mixed media from Mum Paints Lives.
Rachelle has an awesome Earth Day freebie pack on TPT too! I love her stuff!
Here is a cute contractions freebie from First Grade a la Carte.
Here is a freebie with several great ideas for teaching about taking care of the environment.
This is a super cute writing and craft from Room 36.
And of course, to end your celebration a little dirt puddin' will do just the trick! Then you'll be the coolest, most awesomest teacher, right?!?