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Curated Video
Vacation in the Island (Use number lines to solve word problems involving the addition of fractions with like and unlike denominators)
Jeremy and Cathy are on vacation in a small island, and today they are going sightseeing. The map shows them that the walking distance from the hotel to the downtown area is two sixths kilometer. And the walking distance from downtown...
NASA
NASA's Fermi Finds Vast 'Halo' Around Nearby Pulsar
A new study of observations from NASA’s Fermi Gamma-ray Space Telescope has discovered a faint but sprawling glow around a nearby pulsar. If visible to the human eye, this gamma-ray “halo” would appear larger...
Curated OER
Greece - Age of Alexander the Great, Part 4/5
After the death of Alexander, Ptolemy I assumes control of Egypt. Combining Greek culture and Greek and Egyptian know-how, PtolemyÕs engineers design and build the first known lighthouse. Computer generated reconstructions present...