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Visual Calculus: Area of a Circle

For Students 9th - 10th
Students will be able to use The Method of Exhaustion and find the area of a circle by illustrating graphically.
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Circle Picture

For Students 9th - 10th
This site provides definitions for different parts of a circle, pictures to more clearly represent formulas involving circles. Some of the formulas discussed include: area of a circle, area of a sector of a cirles, circumference, length...
Graphic
Curated OER

Parametric Unit Circle

For Students 9th - 10th
This site provides definitions for different parts of a circle, pictures to more clearly represent formulas involving circles. Some of the formulas discussed include: area of a circle, area of a sector of a cirles, circumference, length...
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Web Math: Find Out Things About Circles

For Students 3rd - 8th
WebMath offers a great site for students to practice finding the diameter, area and circumference of a circle.
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Wikipedia: National Historic Landmarks in Hawaii: Palm Circle

For Students 9th - 10th
This portion of Fort Shafter housed the headquarters of the commanding general and his staff, U.S. Army forces, Pacific Ocean Areas, during World War II. By 1944 this command was responsible for the supply and administration of all U.S....
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Etc: Maps Etc: Climate and Watersheds of the United States, 1868

For Students 9th - 10th
A map from 1868 of the United States showing physical features, mean annual temperatures, rainfall distribution, watersheds, and principal products in the area. The average annual temperatures are shown by isotherms, with temperatures...
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Unesco: Indonesia: Borobudur Temple Compounds

For Students 9th - 10th
This famous Buddhist temple, dating from the 8th and 9th centuries, is located in central Java. It was built in three tiers: a pyramidal base with five concentric square terraces, the trunk of a cone with three circular platforms and, at...
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Etc: Maps Etc: United States Population Density, 1850

For Students 9th - 10th
A map from 1912 of the United States, subtitled "Distribution of Population and Railways in 1850." The map is color-coded to show population densities ranging from areas with fewer than 2 inhabitants per square mile to areas of 90 or...
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Etc: Maps Etc: United States Population Density, 1900

For Students 9th - 10th
A map from 1912 of the United States, subtitled "Distribution of Population and Railways in 1900" showing the increase in population and expansion of the railroad network since 1850. The map is color-coded to show population densities...
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Educational Technology Clearinghouse: Maps Etc: Presidential Election, 1884

For Students 9th - 10th
A map of the United States showing the results of the 1884 presidential election. The map is keyed to show the states carried by the Democrats (Grover Cleveland), Republicans (James Blaine), and the areas where minor parties garnered 5...
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Educational Technology Clearinghouse: Maps Etc: Presidential Election, 1900

For Students 9th - 10th
A map of the United States showing the results of the 1900 presidential election. The map is keyed to show the states carried by the Republicans (William McKinley), Democrats (William Jennings Bryan), and the areas where minor parties...
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Educational Technology Clearinghouse: Maps Etc: Presidential Election, 1904

For Students 9th - 10th
A map of the United States showing the results of the 1904 presidential election. The map is keyed to show the states carried by the Republicans (Theodore Roosevelt), Democrats (Alton B. Parker), and the areas where minor parties...
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Educational Technology Clearinghouse: Maps Etc: Physical Europe, 1916

For Students 9th - 10th
A physical map of Europe from 1916 showing color-coded elevations and water depths for the area extending from Iceland to the Ural Mountains in Russia Proper, and the Arctic Circle to the Mediterranean Sea. Land elevation colors range...
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Educational Technology Clearinghouse: Maps Etc: Physical Map of Europe, 1916

For Students 9th - 10th
A physical map of Europe from 1916 showing color-coded elevations and water depths for the area extending from Iceland to the natural boundary between Europe and Asia (Ural Mountains to the Caspian Sea), and the Arctic Circle to the...
Graphic
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Educational Technology Clearinghouse: Maps Etc: Population Density, 1910

For Students 9th - 10th
A map of the United States showing the distribution of the population in 1910. The map is keyed to show areas of population with densities ranging from under 2 inhabitants per square mile to 90 and over inhabitants per square mile. The...
Graphic
Curated OER

Unesco: Russian Federation: Putorana Plateau

For Students 9th - 10th
This site coincides with the area of the Putoransky State Nature Reserve, and is located in the central part of the Putorana Plateau in northern Central Siberia. It is situated about 100 km north of the Arctic Circle. The part of the...
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Curated OER

Unesco: United Arab Emirates: Cultural Sites of Al Ain

For Students 9th - 10th
The Cultural Sites of Al Ain (Hafit, Hili, Bidaa Bint Saud and Oases Areas) constitute a serial property that testifies to sedentary human occupation of a desert region since the Neolithic period with vestiges of many prehistoric...

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