Who knew that you could measure time with a ruler? This great printable resource allows young mathematicians to visualize the hours of the day as they learn to calculate elapsed time. There are many ways to teach elapsed time and using elapsed time ruler as the visual time span for the students to follow is the easiest and fastest way for them to understand and map out elapsed time for themselves. These elapsed time rulers are helpful as a visual aid for your students whenever they are working with elapsed time.