Circular breathing is a method of breathing that is used to "maintain a sound for a long period of time." This article explains how to engage circular breathing as a technique for playing the instrument.

A summary of the circular flow model which demonstrates the interdependence of households and firms in a market system.

A way of organizing the various key signatures, the circle of fifths is a good tool to help visualize the relationships of the different keys. This tutorial includes several self checking quizzes to test your knowledge.

This article describes how termites create circular patterns of bare soil known as "fairy circles" in the grasslands of southern Africa.

Review the key concepts, equations, and skills for uniform circular motion, including centripetal acceleration and the difference between linear and angular velocity.

Students learn about uniform and non-uniform circular motion in this illustrated article.

Discusses the radius, diameter, circumference, and area of a circle.

A nice site that breaks down into three sections: "what is the circle of fifths", "finding key signatures" and "guitar tuning and the circle of fifths."

This challenge is designed to help students move back and forth from different circular motion ideas. These ideas include frequency, rpm, period, angular speed, linear speed, total distance and total radians.

Read about the newest discovery regarding this fascinating ancient landmark on England's Salisbury Plain.

Learn about the Antarctic Circle, where it is located, why it's important, and other interesting facts.

Do ants sometimes ruin your picnic? There are some chemical ant repellents you can spray to keep them away, but who wants to spray poison all over their food? In this experiment you can investigate some less toxic solutions that may be...

Read this U.S. State Department report which finds a global confrontation between growing water demand and shrinking supplies, in addition to predictions for the next thirty years of water security.

Describes the serious global waste crisis, the problem of plastic waste, the issue of wealthy countries exporting their trash to less-developed ones, informal waste management practices, and electronic waste dumps. The article ends with...

The interference of two sets of circular waves with the same frequency and the same amplitude results in a standing wave pattern. These standing wave patterns are known as two-point source interference patterns since they result from the...

This summary of Russian plays and playwrights begins with the 18th century comic playwright, Denis Ivanov Fonvizin and continues through Anton Chekov, with two or three sentence summaries about ten writers and their works.

SalesCircular.com offers the definition of a computer monitor, provides monitor terms, and explains what to look for when shopping for a monitor.

To those of us who live on earth, the most important astronomical object by far is the sun. This article explains how the motion of the sun through our sky cause day and night, the passage of the seasons, and earth's varied climates.

Hans Holbein the Younger was born in Augsburg, Bavaria; He trained with his father, Hans Holbein the Elder, who operated a successful workshop. In 1515, he moved to Basel, where he worked for a circle of intellectuals and their printers....

The Fuller Brooch is the earliest known personification of the Five Senses. This splendid circular brooch is made from hammered sheet silver. The center part is decorated with five figures who represent the five human senses. In the...

A mandala is a schematic diagram that portrays the sacred environment of a particular deity. The mandala is used by practitioners as a guideline for meditation. It helps people visualize the way in which they will restructure the world...

In this blog, a teacher offers strategies for building engaging digital lessons as a result of the Covid Pandemic. My first task is to figure out how to make my lessons clear. I am working without the benefit of being able to circle the...

This site provides step-by-step directions for starting a book club.

Learn about the ancient Greek mathematician regarded as one of the leading scientists in classical antiquity.