On my enhancement, I picked my favorite pictures that did not have very good lighting so I could challenge myself and improve my editing skills.  The first photo, Amy, I first added an Adjustment Levels layer to bump up the contrast and darken the mid tones.  I then used the Stamp tool, the Brush, and the Blur tool to clean up and soften her skin.  I then selected her eyes and used the Levels tool to brighten them.  I then lower the saturation to the whole photo.  The second photo, I applied a Match Color to the photo, I choose another photo that had better coloring and applied it to this photo.  I soften and cleaned up the skin the same way as the previous photo.  I lowered the opacity a little on the Match Color layer.   The final photo, Emily, I first lighten her face up in Camera Raw.  Then I brought her into Photoshop and used an Adjustment Layer Levels to lighten the whole photo.  I did not need to do any enhancements to her face, Emily’s skin turned our flawless.  I did change the color of her coat, but selecting it and applying a color replacement under the Image menu.  It was a challenge working with these three photo and trying to work around the picture quality, but I learned a lot in the process.