What would we do without electricity? It powers our homes, industry and entertainment. This reader discusses the math involved in electricty. Students will learn what electricity is, how it is produced and how it gets to their homes and schools. It discusses kilowatts, megawatts and watts vs. watt-hours. Students use math to discover the cost of electricity to run many everyday appliances. They learn how to read an electric bill. Students are introduced to capacity factor in relationship to the generation of electricity. This reader reviews the five safety rules for electrical safety.