Using a model that will aid students' understanding, this program explains and defines current and voltage as well as series and parallel circuits, looking at current and voltage in each. The relationship between current and voltage is examined and graphically represented. The concept of resistance is introduced. Ohm's law is stated and resistance and ohms are defined. The program then looks at non-ohmic components and covers the resistance of different metals, length, temperature and thickness of resistor, variable resistors and super conductors.