Style & Role of Henri Toulouse-Lautrec’s Posters

In this lesson, you will explore the posters of 19th-century French artist Henri de Toulouse-Lautrec and discover what these meant to both the world of art and the world of advertising. Then, test your understanding with a brief quiz. Henri Read More

How Does the Interstellar Medium Help Form Stars?

This lesson will describe how the interstellar medium plays a role in the earliest phases of the formation of stars. We’ll define what a protostar is, how gravity is important, and what a cocoon is in an astronomical sense. The Read More

Circumcircle: Definition, Properties & Formula

Circumcircles show up in the world around us often. This lesson will define circumcircles, and we will look at various properties of circumcircles and some formulas we can use to better analyze these fascinating shapes. Circumcircle Oh no! The town Read More

Internal & External Fertilization in the Animal Kingdom

Although we tend to think of fertilization from the human perspective, there is actually more than one process of fertilization. There’s the internal one that we already know, and a less familiar, external one. Fertilization In the animal kingdom animals Read More

Judith Butler on Feminism: Theory & Overview

Judith Butler is an American gender theorist whose writing has influenced our understanding of feminism and gender identity. In this lesson, we will define feminism and discuss Butler’s perspectives. What is Feminism? What do you picture when you think of Read More

Function Operation: Definition & Overview

In this lesson, we will define functions and determine how to use specific rules for the addition, subtraction, multiplication, and division of functions. Definition A function is another way to think of an equation that has an x and a Read More

Collateralized Mortgage Obligations (CMOs)

In this lesson, you will learn about a type of complex security called the collateralized mortgage obligation (CMO). A collateralized mortgage obligation is a type of security that uses mortgage backed security as collateral, hence the name of collateralized mortgage Read More

The Adams-Onis Treaty of 1819

Before Florida was the home to Mickey Mouse and Walt Disney World, it was a colony owned by the Spanish. This lesson explains how the United States acquired Florida through the Adams-Onis Treaty of 1819. The Florida Colonies How much Read More

Ureter: Definition & Function

In this lesson, you will explore the function of the paired ureters, as well as how their structure enables them to transfer urine from the kidneys to the urinary bladder. What Do Your Kidneys Do? While your kidneys are, arguably, Read More