5_2_07

Work in two groups to make your own ruler. Use square tiles, which are one inch long. Measure something with them and talk about the **unit**. “What unit did we use to measure? Right, we used color tiles. The color tiles are also the same size as an inch, so we can say the unit is color tiles or inches.” Show students small colored strips of paper that are the same length as the color tiles, and long pieces of paper. Students glue small papers on the long paper strips, doing accurate measuring, and label the numbers. They alternate colors after 12 inches so they can easily see one foot. If there’s time, use the rulers to practice measuring in the classroom.