I've been working with my third graders for the past week or so on measurement, and the biggest trouble area seems to be measuring to the quarter inch. To the inch and to the half inch are both fine. So far here's what I've done to help cement the idea of a quarter inch. We've talked about how an inch can be split into four pieces (and our rulers only go down to fourths, so that helps). I've had them fold a blank piece of paper into fourths, then we color one section at a time to talk about how many pieces out of four are shaded in. They understand that. They also understand that 2/4 is the same as one half because of the colored paper. We've drawn lines in quarter inch increments using rulers. I have a document camera, so the kids can see me draw it on the screen as they do it, too. They can draw the lines just fine, but saying that this line is 1 and 1/4 of an inch, or that this line is 5 and 3/4 inches is the struggle. 3 1/2? Fine. 8 1/2? Fine. Anything with 1/4 or 3/4 is where they seem to struggle. Does anybody have any clever ideas or tricks to help me with my kiddos here? I'd be quite appreciative for any thoughts.