Comparing Paradigms on a Level Playing Field

There are different economic paradigms with very different views of the functioning of the economic process. I argue that it is important to demonstrate the different foundations of these paradigms in an introductory course. This should be done within the same framework so that it becomes obvious, which differences are due to the perspective of the paradigm and not just to different ways of modelling.
In my one semester introduction to economics, I discuss price theory in a simple (one good) production price model while for income and employment the three approaches are compared using the production function which connects the labour market and the goods market of the income expenditure model.