Read the electric meter, and write down the numbers. Then wait until the same time a day later. Read the meter again and write down the numbers. Subtract the first day's numbers from the second day's. This is how much electricity your family used in a day.
Electricity is measured in kilowatt-hours.
By keeping track of how much electricity your family uses, you can see for yourself how much electricity is used by different appliances in your house. Electric dryers, hairdryers, and electric ovens all use a lot of electricity. Try measuring your family's electric use on a day when your parents are doing a lot of laundry or baking, then comparing it to a day when they aren't.