Introducing complex numbers.

The article discusses the introduction of complex numbers to students. The author says that a number line may be helpful to students in understanding negative numbers. He explains that numbers in a number line are considered to be vectors with a magnitude and a direction. He further explains that multiplying complex numbers can easily be understood by students with the aid of a number line and a number compass. He also relates that his students in England and Australia understand the concept of complex numbers after teaching it using the number line and number compass.