In this video segment adapted from Shedding Light on Science, observe demonstrations of the fundamental idea that light travels in straight lines.

In this video segment from Cyberchase, Inez estimates whether she has enough jelly beans in her large container to decorate all of the cookies in her batch.

This video segment adapted from KET's Where the River Bends demonstrates how climate change and glacier movement during the Ice Ages destroyed the old Teays River and created the Ohio River, Kentucky's northern border.

In this fast-paced NASA Brain BitesŒ_íěÖ video, an astronaut demonstrates the impact of microgravity on the use of tools in space.

Brief video describing where and how to find Open Educational Resources, including specific repositories and licences to look for.

In this video segment adapted from NOVA, follow novice runners as they train for a marathon, and discover how quickly the body responds to regular aerobic exercise.

Learn how the Hawaiian Islands were formed by a geothermal hotspot and resulting volcanic activity in this video segment from Nature.

This lesson is about the estimation of the value of Pi. Based on previous knowledge, the students try to estimate Pi value using different methods, such as: direct physical measurements; a geometric probability model; and computer technology. This lesson is designed to stimulate the learning interests of students, to enrich their experience of solving practical problems, and to develop their critical thinking ability. To understand this lesson, students should have some mathematic knowledge about circles, coordinate systems, and geometric probability. They may also need to know something about Excel. To estimate Pi value by direct physical measurements, the students can use any round or cylindrical shaped objects around them, such as round cups or water bottles. When estimating Pi value by a geometric probability model, a dartboard and darts should be prepared before the class. You can also use other games to substitute the dart throwing game. For example, you can throw marbles to the target drawn on the floor. This lesson is about 45-50 minutes. If the students know little about Excel, the teacher may need one more lesson to explain and demonstrate how to use the computer to estimate Pi value. Downloadable from the website is a video demonstration about how to use Excel for estimating Pi.

This art history video discussion looks at Jan (and Hubert?) Van Eyck's "Ghent Altarpiece or The Adoration of the Mystic Lamb", tempera and oil on panel, (closed panels), Cathedral of Saint Bavo, Ghent, Belgium, completed 1432. Second Life correspondents Max Newbold and Sez Zabelin, discuss the closed Ghent Altarpiece (see the next video for a discussion of the open altarpiece) on the Vassar campus in Second Life.

This art history video is the second part of the discussion about Jan (and Hubert?) Van Eyck's "Ghent Altarpiece or The Adoration of the Mystic Lamb", tempera and oil on panel, (open panels), Cathedral of Saint Bavo, Ghent, Belgium, completed 1432.

In this video segment adapted from NOVA: Judgment Day: Intelligent Design on Trial, learn how modern genetics and molecular biology offer compelling support for evolution. The video features an interview with biologist Ken Miller.

Learn about the wildebeest and locusts on the move in this video segment from Nature.

In this video segment adapted from the National Film Board of Canada, learn how the Inuit people have used their traditional knowledge to understand and adapt to changes in their Arctic environment, particularly when hunting and navigating the landscape.

This art history video discussion examines William Holman Hunt's "Claudio and Isabella", 1850, oil on mahogany (Tate Britain). From William Shakespeare's Measure for Measure, Act III, scene 1 (a room in a prison).

This art history video discussion looks William Holman Hunts "Our English Coasts ('Strayed Sheep')", 1852, oil on canvas, 432 x 584 mm (Tate Britain, London).

This art history video discussion looks William Holman Hunt's "The Awakening Conscience", 1853, oil on canvas, 762 x 559 mm (Tate Britain, London).

This 7-minute video lesson looks at 2010 IIT JEE Paper 1 Problem 39.

This 7-minute video lesson continues to look at 2010 IIT JEE Paper 1 Problem 39.

This 3-minute video lesson concludes the discussion of 2010 IIT JEE Paper 1 Problem 39.

This art history video discussion looks at an "Icon of the Triumph of Orthodoxy (Byzantine)", c. 1400, tempera and gold on wood, 39 cm x 31 cm (British Museum, London).