Dealing with scarcity is the basis of economics, but what does it mean to say that something is scarce? In this video, we explore the definition of scarcity in economics and how scarce resources are different from free resources.

This Excel spreadsheet assignment brings students step-by-step through the process of solving and analyzing a Keynesian cross model. It is most appropriate for principles-level macroeconomics courses.

If a factor of aggregate demand changes in response to anything other than a change in the price level shifts aggregate demand. In this video, we explore the shifters of AD and factors that might shift aggregate demand to the left (a decrease in AD) or to the right (an increase in AD). Created by Sal Khan.

We claim that the short-run aggregate supply (SRAS) curve is upward sloping, but why? In this video, we explore the justifications for the aggregate supply curve to be upward sloping in the short-run. Created by Sal Khan.

The interaction of SRAS and AD determine national income. We can compare that national income to the full employment national income to determine the current phase of the business cycle. An economy is said to be in long-run equilibrium if the short-run equilibrium output is equal to the full employment output.

In this video, Sal begins a walkthrough of the process of money creation using a highly simplified example. Created by Sal Khan.

How banks can actually create checking accounts under a fractional reserve system. Created by Sal Khan.

Simple model to understand r and g relationship. A discussion with Sal Khan.

How a supply shock can cause prices to rise and the economy to stagnate. Created by Sal Khan.

A fourth function of money is that anytime you take on a debt, when the time comes to repay it, you can use money. This is highly related to the idea of "legal tender", which you can also learn about in this video. Created by Grant Sanderson.

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In this video, learn about how the model of the foreign exchange market is used to represent the determination of exchange rates.

How government can effect aggregate demand through tax policy. Created by Sal Khan.

The spending multiplier and tax multiplier will cause a $1 change in spending or taxes to lead to further changes in AD and aggregate output. The spending multiplier is always 1 greater than the tax multiplier because with taxes some of the initial impact of the tax is saved, which is not true of the spending multiplier.

Principles of economics students are asked to collect and analyze data on a few macro economic aggregates to give them a first taste of empirical work.

Many people are concerned with growing national debt, but according to Professor Antony Davies of Duquesne University, there are a lot of misconceptions. In this lecture, Professor Davies explores ten common myths about inequality, covering everything from the causes of the debt to potential solutions.

The Macroeconomics digital course enhancements is a comprehensive, open-access resource
for economics instructors to adopt in whole or in part, and is designed to support flexibility for
faculty and students. The content areas are divided into modules for ease of navigation or
partial adoption as needed. We don’t have a required textbook even if we often refer to
chapters in the OpenStax’s Principle of Macroeconomics. In addition, we provide suggestions
for student activities and deliverables for each topic within the modules as well as reference
videos and articles.

This Macroeconomics resource is intended to provide flexible adoption options for instructors.
Instructors may use all of the materials in the modules or select what is most appropriate to
enhance existing course materials. We hope this is a useful tool for economics instructors
regardless of expertise level.

Macroeconomics course collection video from the UNC System OER project. This one-minute video is meant for students. It focuses on what students may think they know about the topic, what students could learn from taking the course, and a brief introduction to open educational resources.