HS Science

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1,100 videos on YouTube covering everything from basic arithmetic to chemistry, biology, calculus and economics. 8 million video views and growing. 70,000 students a month watching 35,000 videos a day. Over 2 million minutes of instruction delivered world-wide in the past week. Self-paced teaching software and assessment. The most used, most exhaustive, and richest instruction on the Internet. Mission of providing a world-class education to anyone, anywhere, for free.

"A new science curriculum unit from The JASON Project enables students to explore one of society's most important issues -- energy --in a new distribution format featuring print-on-demand and other solutions for 21st-century classrooms. "Operation: Infinite Potential" is the third unit in JASON's new line of science curricula, following units on ecology and weather. Each unit fully integrates digital and print content in an inquiry-based approach to instruction. Using research articles, hands-on labs, field assignments, videos, computer games, and other multimedia, students work with leading scientists to investigate and analyze emerging technologies designed to meet the needs of an energy-hungry planet. And for the first time, JASON is allowing free downloading and printing of all online Student and Teacher Editions in the new curriculum."

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This model uses circular orbits to approximate the paths of Mars and Earth. It uses 3:2 as the ratio of their orbital radii (the actual is about 1.524:1), and it uses a ratio of 2:1 as the ratio of the time it takes them to complete one revolution about the sun (the actual is about 1.881:1). It also assumes that the orbits of both planets are circular with the Sun as the center, although this is not the case; in actuality, the orbits are ellipses, and the Sun is one of the foci. However, these approximations are close to the actual data, and they allow for the development of a polar equation (5 ‑ 4cosθ) that produces a perfect limaçon. A representation that uses a better approximation of the actual data will not result in such a nice curve.

"NASA Images" is a service of the Internet Archive, a nonprofit digital library. It was created under a Space Act agreement to offer unprecedented access to NASA media (including images, video, and audio), functioning as a free online library for all of NASA's multimedia content. Users can search for material by keyword or theme (such as Earth, Astronauts, Solar System, or Universe), or they can browse through several featured collections. The site is constantly growing with the addition of current media from NASA, as well as newly digitized media from the archives of the NASA Centers.

In response to the commercialization of science and the growing problem of conflicts of interest, the Integrity in Science Project seeks to: * raise awareness about the role that corporate funding and other corporate interests play in scientific research, oversight, and publication; * investigate and publicize conflicts of interest and other potentially destructive influences of industry-sponsored science;

pre-K to 6 ela, science, math, geography interactive games and activities

Explore weather through a small collection of games and activities provided by BBC, including a weather-word hangman, a do-it-yourself weather map, and weather quiz.