Lesson objective: Find the length of an object using measurement tools and units from two different measurement systems.

This lesson helps to build procedural skill with measuring the length of various objects. Measurement tools and cubes are used here because they support the connection between single units and the units on a measurement tool. This work develops students' understanding that there are two different measurement systems, each involving different units.

Students engage in Mathematical Practice 6 (Reason abstractly and quantitatively) as they measure different sized objects using tools and units associated with the metric and customary measurement systems.

**Key vocabulary:**

- foot
- inch
- length
- meter
- meter stick
- ruler
- tape measure
- tool
- unit of measure
- yard
- yardstick

**Special materials needed:**

- centimeter ruler
- inch ruler
- meter stick
- ruler
- tape measure
- yardstick