Both the federal government and many state governments impose "sin taxes" that tax items and activities which are considered socially harmful. This article explains these taxes and shows how much states and the federal government raise...

"Portrait of Sin Sukju" reflected both the honor that Sin Sukju brought to his lineage as a meritorious official in Korea as well as Confucian beliefs about the afterlife. View the portrait and read about the person it commemorated.

Japanese theoretical physicist Sin-Itiro Tomonaga resolved key problems with the theory of quantum electrodynamics (QED) developed by Paul Dirac in the late 1920s through the use of a mathematical technique he referred to as...

A learning module that begins with the short story "The Worst Sin" by Joshua Salik, accompanied by guided reading questions, assessment questions, and discussion questions. The text can be printed as a PDF or assigned online through free...

In addition to explaining what sin taxes are, this article focuses on unintended negative consequences of these taxes.

The interactive tutorial explores the graph of the derivative of sin (x).

This applet allows the user to create the graphs of sin, cos, and tan by moving a scroll bar. The user can watch the unit circle and the graph simultaneously to see how the two are related. The user may also choose to see the angle...

Lists five "deadly sins" to purge from your writing. If you're not sure how to correct these errors, just click on the list item to link to more information.

Read the full text of the short story "The Venial Sin" by Honore de Balzac.

Text of the short story "Reginald on Besetting Sins" by H. H. Munro. (Free site registration offers some additional features, e.g., the ability to insert annotations.)

Read the full text of the short story The Secret Sin of Septimus Brope by H. H. Munro. Register for a free account to unlock annotation tools, printing, and more.

This article discusses the evolving issues of racism against the aborigines of Australia.

In this activity, students explore a right angled triangle and its trigonometric concepts. They investigate the trigonometric ratios for the angles of the triangle.

An academic essay describing the ways in which "religion is an active if not a determinative" cause for the American Revolution. The essay describes three influential areas: (1) religion and liberty, (2) religion and community, and (3)...

A complete reference guide to the sine function. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

This media gallery explores the inspiration for and reception of "The Crucible" during the Hollywood Blacklist with videos from the American Masters film "None Without Sin." The videos and support materials are best used during or after...

This video and support materials detail the Hollywood blacklist and House Un-American Activities Committee, chronicling the fear of Communism and resulting blacklist based on political ideology. The video is from the American Masters...

These videos and support materials explore the intense division experienced by those who testified before and blacklisted by HUAC during the Cold War, focusing on the testimony of Elia Kazan. The videos are from American Masters None...

Burning incense sticks at Wong Tai Sin Temple (Hong Kong)

Wong Tai Sin Temple entrance gate (Hong Kong)

Wong Tai Sin Temple (Hong Kong)

The religious beliefs in Sumer correlated with nature and agriculture. Read some of their religious stories to better understand their society and compare these stories to well-known Bible stories from today. A bibliography and pictures...

An image of "Sin", created by Franz Von Stuck in 1893 (Oil on canvas, 88 x 52 cm).

This MathWords.com site, which is a glossary of math terms, shows the relationship in radians and degrees between sin and cos, tan and cot, and sec and csc.