September 2007: You make the rules (solution)

There are several solutions. Here's one. Divide the ruler as follows:

1"=1"
2"=1"+1"
3"=1"+1"+1"
4"=4"
5"=5"
6"=1"+5"
7"=1"+1"+5"
8"=1"+1"+1"+5"
9"=5"+4"
10"=1"+5"+4"
11"=1"+1"+5"+4"
12"=1"+1"+1"+5"+4"

(Other submitted solutions are 1-3-1-5-2, 2-5-1-3-1, 1-3-3-3-2, and 1-1-4-3-3)

Correct solutions: Ritoban Basu-Thakur, Kristin Jekielek, Richard Rast, Anna Marion, Danielle Newcomer ('07), Mike Scanish ('01)