👉 Learn how to evaluate the limit of a function by rationalizing the radical. The limit of a function as the input variable of the function tends to a number/value is the number/value which the function approaches at that time. The limit...

👉 Learn how to find the critical values of a function. The critical values of a function are the points where the graph turns. They are also called the turning points of a function. To obtain the critical points of a function, first, we...

You don't need to be religious to study religion. This might sound really obvious to you...but from my experience, lots of people assume this.

👉 How to write the rule of a function given the table of values. To write the rule of a function from the table is somehow tricky but can be made easier by having prior knowledge of the type of function. If the function is a linear...

👉 Learn how to evaluate the six trigonometric functions given a right triangle. A right triangle is a triangle with 90 degrees as one of its angles. A right triangle is made up of two legs, which formed the sides of the 90 degrees angle...

In this video, the teacher explains how to write a closing paragraph that stays on topic for a writing prompt. The teacher emphasizes the importance of referring back to the prompt and the main ideas of the response. They provide clear...

English grammar lesson for beginners on three basic parts of speech. Two interactive practice activities: sorting and odd-one-out.

👉 How to write the rule of a function given the table of values. To write the rule of a function from the table is somehow tricky but can be made easier by having prior knowledge of the type of function. If the function is a linear...

👉 Learn how to find the derivative of a function using the chain rule. The derivative of a function, y = f(x), is the measure of the rate of change of the function, y, with respect to the variable x. The process of finding the derivative...

👉 Learn how to add and subtract mixed numbers. Mixed numbers are numbers with two parts: the whole number part and the fraction part. Mixed numbers are ways to represent improper fractions using proper fractions.To add or subtract mixed...

This fascinating program helps students understand the basics of heredity. Acquired traits and inherited traits are defined and contrasted. Special emphasis is placed on some easy to understand human traits that are inherited. Concepts...

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function,...

ACT SAT Prep How to determine the perimeter of a triangle using similar triangles

👉 Learn how to find the derivative of exponential and logarithmic expressions. The derivative of a function, y = f(x), is the measure of the rate of change of the function, y, with respect to the variable x. The process of finding the...

Lyn Ossome is Senior Research Fellow at the Makerere Institute of Social Research (MISR), Kampala. She holds a PhD in Political Studies from the University of the Witwatersrand, South Africa, and was previously Postdoctoral Fellow at the...

Michael Rich, MD, MPH, is Associate Professor of Pediatrics at Harvard Medical School, Associate Professor of Social and Behavioral Sciences at the Harvard School of Public Health, and practices Adolescent Medicine at Boston...

In this video lesson, the teacher explains the meaning of the idiom "a taste of your own medicine" through the use of cartoons. The idiom refers to teaching someone a lesson by treating them the same way they treated you. Through visual...

👉 Learn how to find the domain of rational functions. Recall that the domain of a function is the set of possible input values (x-values) of the function. For a rational function, the denominator cannot be zero. Thus, to find the domain...

Dr. Mark Naison, Professor of African American Studies and History at Fordham University, is the author of seven books and over 300 articles on African American politics, labor history, popular culture and education policy. His first...

👉 Learn how to label points, lines, and planes. A point defines a position in space. A line is a set of points. A line can be created by a minimum of two points. A plane is a flat surface made up of at least three points. A point is...

Last summer I put a video camera in the hallway and asked the participants if they wanted to share anything about their experience. The responses were kind and humbling. I'm very glad that they got so much out of it. If you teach AP...

Jane Chikapa is a top fifty Global Teacher Prize finalist. Jane teaches English in a secondary school located on the edge of Lake Malawi – an area where many people value working in the fishing business over the pursuit of education....

Andrés Richner is the Director of Technology at the Yale Center for Emotional Intelligence, where he spearheads the development of an online learning platform to support RULER, the Center’s approach to social emotional learning and...

In courses such as The Teaching of Writing, Writing Non-Fiction, and Teaching English in Diverse Social/Cultural Contexts, Sealey-Ruiz, who started her career as a high school English teacher in 1993, seeks to “guide...