After many years of teaching circuit theory and analogue electronic circuits the author believes that for most students the main path to obtaining a good understanding of the principles involved, as measured by their ability to apply them in a correct and intelligent manner, is through problem solving and design exercises. In an ideal world the student would be able to construct the circuit being analysed or designed, and so directly test the calculated or pre- dicted results. Indeed, experience leads to the conclusion that typical students like to see their own circuits perform as intended,...