The double exposure project is done to teach students about how to combine two photos into one. Traditional double exposures layer the two exposures and are permanent. Photoshop double exposures use layer masks and can be changed to view different results.
I took a photo of my friend and placed a photo of some Autumn trees behind her outline. I then chose a light color from the photo of the trees and placed it as the background color. The result is a photo with a cool or chilled feeling.