NASA
Water Works on a Blue Planet
Keep within a water budget. Learners find out that less than 2.5% of Earth's water is available to drink—and that there is a fixed amount of water. Scholars read an interesting article comparing the available water to a game of Monopoly...
NASA
Taking Apart the Light
Break down light into spectra. Scholars learn how atoms emit and absorb photons and come to understand how this process allows scientists to identify different atoms based on either absorption lines or emission lines. Learners then...
Curated OER
History Matters: The Bum as Con Artist
History Matters reprints a 1929 newspaper article by journalist Tom Kromer, who contended that the beggar was a con man in the beginning of the Great Depression. It seems that Mr. Kromer became unemployed himself within the year, so...
Smithsonian Institution
Tween Tribune: Week of 6 13 16: Muhammad Ali, and Why He Mattered
The Beatles' first visit to the United States was in 1964. Clever publicity agents arranged a meeting for the band with Cassius Clay. He was training for the bout that would make him heavyweight boxing champion. The result was a...
Curated OER
History Matters: Landon in a Landslide: The Poll That Changed Polling
"Dewy Wins" is not the only big mistake made by journalists in predicting the outcome of presidential elections. This article from the Literary Digest, October 31, 1936, predicted that Alf Landon would defeat Franklin Roosevelt by a...
Open Curriculum
Open Curriculum: Images, Quantitatively
This article helps students quantitatively describe the changes in images on mirrors or other surfaces.
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