so i routinely have been getting 3-4 years out of these cartridges. when it says 'choose position for kick-off', you should click on a square (it goes yellow), then on 'done' (at the top line). the men looked like they had come out of some ancient history book. remember, if you’re not sure, ask! once you are in your early post-high school period, sometime between the ages of 18 and 21, you should have a test done. when we were through, i was sweating. 