# Metric and U.S. customary units intro

8 videos
1 skill
The International System of Units used today is based on the metric system. The United States, however, likes to dance to a different drummer and still uses the old British Imperial System (U.S. customary system) for most of its measuring. This tutorial will introduce you to both for measuring distance, volume, weight and time. Common Core Standard: 4.MD.A.1

### Metric system: units of distance

VIDEO 6:56 minutes
The great thing about the metric system is that everything is measured in terms of ten. You've heard of meters, kilometers, centimeters, and millimeters, right? Let's get their definitions down pat.

### Metric system: units of volume

VIDEO 4:14 minutes
How much is it to drink a liter of soda? First off, drinking a liter of soda could result in some serious cavities. Nonetheless, understanding metric units of volume (like liters and milliliters) is really important. Soda? Not so imporant.

### Metric system: units of weight

VIDEO 4:26 minutes
Let's jump into the world of metric weight measurement! Nice to meet you, milligram. You, too, gram and kilogram. Let's get to know each other.

### U.S. customary units: distance

VIDEO 5:11 minutes
From small to big, these units of distance got you covered: inch, foot, yard, and mile. Let's be sure we understand them.

### U.S. customary units: weight

VIDEO 3:40 minutes
Would you measure the weight of your parents' car in ounces, pounds, or tons? Actually, you could measure in all three! However, you want to choose the unit that is most convenient in terms of numbers of units. Let's learn more.

### U.S. customary units: fluid volume

VIDEO 7:21 minutes
Of all the US customary units of measurement, weight has the highest number of commonly-used units: teaspoon, tablespoon, fluid ounce, cup, pint, quart, and gallon. There's a chance that you'll come across a recipe that uses many (if not ...

### Finding reasonable unit of measurement example

VIDEO 3:47 minutes
The truth is that you can use almost any unit of measurement as long as you're willing for that number to be really big or really small. The key is to find the most "reasonable" unit. Can you help?

### Choose pounds or ounces to measure weight

VIDEO 1:15 minutes
When choosing which unit of weight to use, the most common options are pounds and ounces. I don't imagine that weighting you dog in tons is going to be very helpful, do you?

### Unit sense

PRACTICE PROBLEMS
Identify the most reasonable units to measure an item.  Units are metric measures of distance, volume, and mass and units of time.