The original theatre of Aphrodisias in Asia Minor in Turkey, dates from the Late Hellenistic period, but it was extensively renovated between 38 and 28 BC. An architrave inscription records that the remodeled theater was dedicated to...

This video is a lecture on how to calculate percentage changes, which is a crucial skill in the field of economics for dealing with large and significant numbers. The lecturer explains the definition of a percentage, how to calculate...

El Portal, a small town off Highway 140 on the southwestern boundary of Yosemite National Park, had its humble beginnings in 1885 as a “company town”—mining, logging, railroad, and then tourism. These industries brought not only workers...

The video is a lecture on supply curve shifts in economics. It explains the concept of how changes in factors other than price affect the quantity supplied of a good, leading to a shift in the supply curve. The lecturer describes the two...

👉 Learn how to solve problems using percents. When solving problems with percents we will either convert the percents to decimal form or use proportions to solve. We will look to solve for the percent of change, the original price,...

In this video, we will teach viewers how to solve for unknown percentages using various methods, including the bar model, table, and proportion. We will walk viewers through three examples, including how to calculate the percentage...

In this video, the teacher explains how to use systems of equations to solve word problems. They use the example of buying gummy bears and chocolate at a store to demonstrate the process.

Go on a journey to explore visual and audio illusions, sensory puzzles, and brain tricks from the worlds of art, science, nature, and psychology. Learn about afterimages, optical illusions that appear in one's vision after exposure to...

In this video, the teacher explains how to use patterns to model growth that increases by multiplying, rather than adding. They demonstrate this concept using examples of enlarging photocopies and counting dots in a figure. By...

This video explains the concept of reverse percentages, which involve finding the original value after an increase or decrease has occurred. The instructor demonstrates how to use percentages to calculate the original value, using...

Roland Barthes’ The Death of the Author is a seminal text in the development of literary theory. Often considered the moment when structuralism gave way to poststructuralism as the dominant approach to cultural analysis, in The Death of...

This video is a lecture on percentage increases, with a focus on how to calculate them for interest calculations and profit margins. The presenter explains two methods for calculating percentage increases, the unitary method and using a...

We’re traveling to the oldest city in the US and we’ll find that it’s as active as ever. We can’t visit St. Augustine without letting you sample a drink from the Fountain of Youth! We show you the very spot where the city’s history...

This video explains the concepts of congruence and similarity of shapes in mathematics. The speaker then explains how to calculate the scale factor, which determines the ratio between the lengths of the corresponding sides of two similar...

The Cathedral of Santa Maria Assunta (Cattedrale di Santa Maria Assunta) is a basilica church on the island of Torcello, Venice, northern Italy. It is a notable example of Venetian-Byzantine architecture, one of the most ancient...

When you change the size of a shape by making it larger or smaller, the degree to which you change its size is measured by something called its scale factor. A linear scale factor is simply the size of the enlargement or reduction of a...

This question seems like it requires calculus, but it actually has a much more clever solution

In this video, the teacher explains how to determine the percent rate of change using exponential models. They review compound interest and linear functions, and then go on to discuss exponential growth and depreciation.

In This Episode, Tyler Teaches Us About Graphing a Line Equation

Creativity and the Common Core State Standards are both important to today’s teachers. Yet, for many educators, nurturing students’ creativity seems to conflict with ensuring that they learn specific skills and content. In this...

In this short video we will answer a standardized math test question where we are asked to identify an algebraic expression that represents the final cost of an item after a discount. We will understand that discount means we pay less. ...

In the bakery the flour container has six and two sixths cups. The baker used two and four sixths cups of flour to bake bread and two and five sixths cups to make cake. How many cups do we have left?

“If there was a moment when our crisis in education hit critical mass it may well have been the date Sir Ken Robinson’s TED talk went up on YouTube. In just 19 minutes his wry but eviscerating presentation gave voice to what so...

In this video I explain the reserve requirement, the money multiplier, and how money is created. Try it on your own. Good luck!