Sketch 6 works great with photos that are progressive. Action shots or instructional shots. By placing them off center and on top of each other you have a line to follow with your eye.
I chose photos of Bug-A-Boo crying and then recovering after seeing me run through the castle at the Half-Marathon. It was heartbreaking. I ran through the castle, ran over to her, gave her a kiss and hug and then had to keep going. She started to cry and yell, "momma, don't go." Prince Charming captured the sadness and recovery.
Sketch 7 can easily be adapted to fit more than one photo. You can increase the size of the box in the middle and add a couple photos. For a 12x12 you could increase the photo to a 4x6 and add a larger frame.
I went the 12 x 12 route.
Sketch 8 is a pretty basic sketch.