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...

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.

A Word document explaining and giving examples of the 11 steps of solving linear programming models using the Simplex Method.

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

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...

An awesome collection of student-generated poetry about pumpkins. The site is fully illustrated with student work.

Explanation of linear equations and four types of slopes: positive, negative, zero, and undefined. Practice problems for the students are provided and a reinforcement activity using a graphing calculator is offered for the teacher's use.

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.

Explanations and examples of different verb forms including main verbs, infinitives, and various tenses.

Write equations in point-slope form given two pairs of values, and convert the equation into slope-intercept form. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

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,...

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

An extensive history of the League of Nations which gives details on the many drafts that were put forward before it was formed, the founding countries and their different perspectives and problems which occurred later.

Explains what the slope-intercept form is and how to find the equation of a line given two points on it. Includes modeled video lesson. [3:32]

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

A description of many different forms of popular culture in the first half of the 19th century ranging from sensationalized newspapers to dime novels to pseudoscience. Read about Stephen Foster's music, theatrical productions, and even...

Objective of this research was to investigate the cultivation of corn and squash from Archaic period. Human selection transformed teosinte, a weed, into earliest form of maize.

Presented by the University of Alberta, this resource contains information on the founding and development of The Grand Trunk Pacific Railway. The site also provides primary source resources in the the form of photographs, excerpts,...

An exhibition review on the Japanese art form Ukiyo-e. Very nice images and history of this art form with an interpretation of an historical link of Japan and the Western world.

Explains what natural gas is, how it is formed, its composition, measurement terminology, how companies locate and extract it, processing, how it is transported and stored, uses, and safety considerations. (Published: September 20, 2011)

Provides lots of information about Alberta's oil sands, including what they are and how they formed, what Alberta is doing to lessen the impact their development has on the environment, a glossary, FAQs, an infographic, regulations and...

Article explaining what limestone is, how it is formed, where it occurs, the different types, and how it has been used throughout history. (Published: August 8, 2010)

This resource, provided by NATO, presents the full text of all fourteen articles of the The North Atlantic Treaty of 1949.

An excellent resource for learning about sedimentary rocks and how they form. The different types of sedimentary rocks and deposits found in Kentucky are listed, with links to dedicated pages for each. Covers clay, shale, sandstone,...