The rule of thirds is a terminology  used in media . It  is where  an image is split up  by two vertical lines and two horizontal lines, making  9 sections on the image.  Normally  the main focus of the image  will be found in the middle section.

 Through the two individual  portrait images , I have used the rule of thirds by lining  up the persons eye focus with the top horizontal line, or just before.On the group phtoto i have also lined up their eye focus with the top horizontal line in order for the viewer to be automatically drawn to them instead of what is going on in the back ground.