The PE games you will find on this site are used by professional physical education teachers as part of successful programs in elementary gyms. Great ideas for teaching PE, and there are videos that show how to play the games.
This link is for a set of 36 wood rulers that measure to the 1/4 inch (for $7.49...what a deal)
Great resource for 3-Act Tasks organized by grade-level standards. There are also good videos about content and philosophies about teaching math.
Here is a pdf of the directions for the 1-100 task. I couldn't seem to attach a photo with the right orientation, so you will have to turn your head sideways.