There has been some research on the learning benefits of exposing students to nature — by either bring them to it or it to them.
Here are a few resources, and I hope that readers will contribute more:
Mom Was Right: Go Outside: Young children are increasingly shunning the country, even as scientists outline the mental benefits of spending time in natural settings is by Jonah Lehrer and appeared in The Wall Street Journal.
I’ve written a couple of posts exploring research on having plants in the classroom:
Do You Keep Plants In Your Classroom?
Here’s a study that showed “the addition of the potted plant enhanced people’s creativity.”
More On Teen Sleep is a post I wrote on the value of making sure we keep the windows clear in our classrooms.
Again, please share other resources I’ve missed.