Open Door Policy - AP® US History Crash Course

Open Door Policy: AP® US History Crash Course

The AP® US History exam covers centuries of topics, policies, trends, and events, and you need to have a solid working knowledge all of them in order to score well. However, you don’t need to be an expert on every battle, law, and political debate. The most important things to know on each topic for the APUSH test are what it is, its historical context or setting, and why it is important in the scope of US History. In this AP® US History crash course, we will review those aspects of Open Door Policy.

Endosymbiosis - AP® Biology Crash Course

Endosymbiosis: AP® Biology Crash Course

In this article, Endosymbiosis: AP® Biology Crash Course, we will start by reviewing the theory itself. We will then present the evidence that scientists have collected in support of the theory. Finally, we will go over a free response question that was seen on the 2011 AP® Bio exam.

Federalists vs Antifederalists - AP® US History Crash Course

Federalists vs. Antifederalists: AP® US History Crash Course

As a student of AP® US History, you probably know the Constitution and all its amendments like the back of your hand. But, did you know that the story of the Constitution is so much more than what you may have heard? Ratifying the Constitution was a long and drawn out process, mostly because the states were divided into what they wanted for a government. Some states wanted a strong, central government. The citizens that shared this idea were called Federalists.

Thirty Years War: AP® European History Crash Course

AP® European History is full of significant and memorable wars that shaped the direction of Europe and, by extension, the world. One of these wars is the Thirty Years War. Perhaps your course did not emphasize this war, or maybe you just don’t remember it!

Nullification Crisis - AP® US History Crash Course

Nullification Crisis: AP® US History Crash Course

The Nullification Crisis was one of the most dramatic scandals to sweep the nation. Watching the headlines during the presidency of Andrew Jackson was like watching a reality television show today: everyone was wondering what would happen next.

Cell Membrane - AP® Biology Crash Course Review

Cell Membrane: AP® Biology Crash Course Review

Cells have many organelles to memorize and understand. One of the organelles that you must know for the AP® Bio exam is the cell membrane. In this AP® Biology Crash Course Review, we will go over the important information that you need to know for the AP® exam about cell membranes.

Standard Deviation - AP® Statistics Crash Course Review

Standard Deviation: AP® Statistics Crash Course Review

Standard deviation is used to test variability in statistics by calculating the average distance from the mean of all the values in a data set. Another way to think of it is to ask, “How much do the values in this data set deviate from the mean value?”

Industrial Revolution - AP® US History Crash Course

Industrial Revolution: AP® US History Crash Course

The Industrial Revolution is typically most closely associated with European countries, but it also had a profound impact within the United States. It was certainly spurred on by the movement in Europe, but it also became intrinsically American. The Industrial Revolution’s importance in America cannot be glossed over when you are studying for the AP® US History exam. To fully understand how America got from the Revolutionary War to where we are now, you will need to understand the Industrial Revolution. Lucky for you, we are here to help.

Cell Organelles - AP® Biology Crash Course

Cell Organelles: AP® Biology Crash Course

All cells are self-sustaining entities with different tasks divvied up to different components of the cell. These components are what we call cell organelles. Cell organelles perform important tasks to maintain normal cell functions including cell division. For Advanced Placement (AP) Biology there are two main eukaryotic cell types, the animal cell and the plant cell, which you need to understand well. A eukaryotic cell is a type of cell that possesses a distinct membrane-bound nucleus, whereas a prokaryotic cell does not have a nucleus.Here we will focus on eukaryotic cells.