Creative Masking...

Using masks in Photoshop is an essential skills to master.  Masking ensures that you don't alter any of the actual pixels in your layer -- just hide or show them as you need.  I wanted students to create a scene that involved multiple pictures of themselves interacting in some way.  Here's the example I started them with:

Evolution of Tennis

So an interesting thing happened in Round 2 of Photoshop Tennis.  My students had enjoyed the first round so much that I started them off with another picture (taken by one of the students during a field trip):

Sapsucker Woods

Tennis

Photoshop Tennis is a time-honored tradition among digital artists.  If there were ever a sport that deserved recognition and inclusion in the Olympics (winter AND summer), it is this one.  "No room," you say.  Well, get rid of Rhythmic Gymnastics and Curling-- problem solved!  I mean, seriously -- Curling?!