The rule of thirds is a composition rule that helps you compose an image to make it more pleasing to the eye.
Objective:
Use Gimp to crop an image using the rule of thirds.
Example:
![Original Image](http://cdn.aschool.us/teaching/Technology/Gimp4Ed/IMG_4689.jpg)
The original image was cropped so that the head of the fox is in the lower right third of the image.