Mansel Wells's Public Library

World History : HyperHistory Online navigates\n through 3 000 years of World History with links to important persons of world historical importance; civilization timelines; events and facts; and historical maps"\n\n"keywords" Content="World History, history,worldhistory, Great Depression, Medieval History, Middle Ages, Free, Information, Online, Buy Chart, millennium, World Cultures, world history chart, Einstein, andreas, world war, education, civilization, timeline, chronology, synchronoptic, timetable, timetables, rulers, writers, discoverers, scientists, philosophers, art

www.hyperhistory.com/...a.html - Preview

hyperhistory

plasma.nationalgeographic.com/pearlharbor - Preview

www.nationalgeographic.com/...index.html - Preview

www.nationalgeographic.com/...j1.html - Preview

www.nationalgeographic.com/...index.html - Preview

americanhistory.si.edu/onthemove - Preview

historyexplorer.americanhistory.si.edu - Preview

faculty.washington.edu/...introb.html - Preview

Sortable by grade levels, title or benchmarks

www.sciencenetlinks.com/matrix.php - Preview

Podcasts with transcripts

www.sciencenetlinks.com/sci_update_index.php - Preview

audio

www.sciencenetlinks.com/Esheet.php - Preview

www.folger.edu/...Digital-Image-Collection - Preview

literacynetwork.verizon.org/...courses - Preview

illuminations.nctm.org/ActivityDetail.aspx - Preview

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.

illuminations.nctm.org/ActivityDetail.aspx - Preview

Illuminations has 104 online activities available. Select which types of activities you're looking for, and click Search to search by K-2, 3-5, 6-8 or 9112

illuminations.nctm.org/ActivitySearch.aspx - Preview

illuminations.nctm.org/Activities.aspx - Preview

The games of Calculation Nation™ are organized around content from the upper elementary and middle grades math curriculum. By becoming a citizen of Calculation Nation™, your child or student will play online math strategy games that allow them to learn about fractions, factors, multiples, symmetry and more, as well as practice important skills like basic multiplication and calculating area — all while having fun.

calculationnation.nctm.org/...ForEducators.aspx - Preview

Create customized activity sheets for your classroom! Nets of 3-D shapes, tessellations, coordinate graphs, and more — all based on your input.

illuminations.nctm.org/ActivityDetail.aspx - Preview

Teaching With Documents:
"'A Date Which Will Live in Infamy'"

www.archives.gov/...day-of-infamy - Preview