ruler: Small tool used for measuring
yardstick: Large tool used for measuring
inch: Small unit of measure
foot: 12 inches = 1 foot
yard: 36 inches = 1 yard ... 3 feet = 1 yard
capacity: Measurement of liquid
cup: Small unit of liquid measurement
pint: 2 cups = 1 pint
quart: 2 pints = 1 quart
gallon: 4 quarts = 1 gallon
weight: Measurement of how heavy something is
ounce: Small unit of weight measurement
pound : 16 ounces = 1 pound
The fractional parts we focus on in third grade are 1/4, 1/2, and 3/4.