This picture use the Rule of Thirds effectively. It has the grids in the picture which creates the rule of thirds.
http://farm1.static.flickr.com/190/441207605_282f6cbdcd.jpg This photo "leads the subject", because the subject is shows what exactly they are doing.
http://ww1.hdnux.com/photos/10/40/57/2231276/5/628x471.jpg |
This picture doesnt use the Rule of Thirds effectively.
http://i1.squidoocdn.com/resize/squidoo_images/590/draft_lens17927214module150051908photo_1304831884rule-of-thirds.jpg This photo does not "lead the subject."
http://4.bp.blogspot.com/_3NGuSIMExlg/TKyHH49aYRI/AAAAAAAAB0w/CFapYhzN8xw/s540/LOWRESPD_10.jpg |