This website discusses the concepts of marginal utility and value, with references made to such economic philosophers as Adam Smith, Karl Marx, and David Ricardo.

This lesson focuses on total utility and marginal utility including definitions and examples.

Can happiness be measured? Students will learn how utility relates to economic decision making and the law of diminishing marginal utility.

Practice applying the utility maximization rule in this exercise.

Another approach to maximizing utility uses indifference curves (sometimes called utility curves) and budget constraints to identify the utility optimizing combination of consumption. Read about this method in this article.

Lists the determinants of demand for a product and service. The site is useful for students wishing to look further into the causes of demands. Graphs and summaries are included to aid research.