By the end of this section, you will be able to explain the law of the conservation of energy; describe some of the many forms of energy; and define efficiency of an energy conversion process as the fraction left as useful energy or...

Given a complex number in rectangular form, write it in polar form. And given a complex number in polar form, write it in rectangular form. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...

This resource is about factorizing trinomials of the form x^2+bx+c by making them into a product of two binomials x^2+bx+c=(x+m)(x+n) where m+n=b and m*n=c

An article focused on the drastic conditions and ruination of children who work on farms. The Human Rights Watch investigates the corruption of farmers abusing their child employees from their working conditions, hours, and pay among...

Students can study detailed histories, illustrated research reports, photographs, documents, and maps to explore the various forms of radicalism that surfaced during Washington's Great Depression.

Presents a history in the form of a timeline of the persecution of witches prior to the Salem witch trials.

Biography of Sprague, who is responsible for the development of electric trailways, electric elevators, and a commercial form of the electric motor.

Examine the different arguments for and against democracy by ancient Greek leaders and philosophers. The main critique of democracy came down to the question of whether we trust the masses to make informed decisions? Follow the rise and...

William Faulkner's self-proclaimed masterpiece, As I Lay Dying, originally published in 1930, is a fascinating exploration of the many voices found in a Southern family and community. Young scholars will explore the use of multiple...

Download these free worksheets to sharpen your skills working with powers of ten. Sheets focus on whole numbers and decimals in comma/point and point/comma formats and are in both standard form and exponent form.

This is a thorough overview of Wegener's granulomatosis, a form of arthritis, which also includes information on symptoms, treatment, prevention, and so on.

This Wikipedia encyclopedia site examines a wide range of different forms of governments that have been suggested and/or used in practice. Topics include anarchism, autocracies, meritocracies, monarchies, democracies, republics,...

Students trace the generation of the formed elements of blood from bone marrow stem cells, and then learn the role of hemopoietic growth factors in promoting the production of the formed elements.

A manual for the inspection of vehicles in Texas, to see if they meet the state government standards for emissions and safety. [PDF]

The minerals that make up igneous rocks crystallize at a range of different temperatures. The sequence in which minerals crystallize from magma is known as the Bowen reaction series. An explanation of the reaction series is provided...

Math Academy Online presents a great M.C. Escher (1898-1972 CE) site for connecting the arts and mathematics. As even Escher said, "For me it remains an open question whether [this work] pertains to the realm of mathematics or to that of...

The cementing of minerals together forms a sedimentary rock called sandstone. One form of sandstone is rock asphalt. Learn more about it here.

Article discussing early forms of writing in the Ancient Near East. Includes links to additional information.

Did you know that the hot-air balloon is the oldest form of successful human flight? Briefly described is the history and construction of hot-air balloons. Follow the link to "images of hot-air balloons and balloon racing" to view...

This site from the University of Notre Dame provides an easy guide to understanding the complex Summa Theologica by St. Thomas Aquinas. It does not cover all of his work, but the main tenets such as Aquinas's views on the Scripture and...

A primary source document in the form of a letter that describes Leisler's Rebellion. "Leisler's Rebellion sparked a division among New Yorkers that largely followed ethnic and class lines."

Historical overview of two early forms of printmaking: intaglio and lithography.

The personal narrative, apart from appearing as an option in the writing component of many state assessment tests, is a form of writing which allows students the chance to reflect seriously and honestly on important events in their own...

In this lesson, students will learn how to find an equation of a quadratic function when given the vertex of the parabola, and how to find the equation that defines a quadratic function when given three points.