This measurement lesson is intended for primary elementary grades (K, 1, and 2). It introduces students to measurement by having them measure using an everyday object (paper clips). Then, it has students explore measuring using a ruler, and students learn basic principles of measurement, such as: 1) how to line up the ends of the measuring tool so that it's touching but not overlapping and 2) where to start and stop measuring. It's a great introduction to measuring and is interactive, so stud