Does anyone hate teaching how to measure as much as I do? The children never get it (at least mine don't). I work on it for months and finally lightbulbs start going off.
One of the things I started to do that seems to help is to make a LARGE line segment on a piece of paper (I make mine 16 inches long).
On either side I mark "0" and "1". Then using the inch marks on the rule I put a mark for every inch. When I'm done I have a HUGE inch that is divided into 16ths. The children use these during math and for homework (they have two copies-one stays at school and one at home).
Then I used butcher paper to make another GIANT inch (48 inches). I also marked that "0" and "1" on either side and drew marks every four inches. Now I have a huge ruler for my floor. Laminate it and call on students to stand on whatever measurement you give them!