Show students the meter stick. Ask them what they think it measures.
Tell students that a meter stick is one meter long. One meter is the same as 100 centimeters.
Using a ruler, show students how long one centimeter is.
Ask students what types of things they might measure with a meter stick. Give them a few examples and have them share whether they would measure with a ruler or a meter stick (smaller things would be measured with a ruler, larger things with a meter stick).