LearnOutLoud.com presents the Internet's first directory for podcasts you can learn from. They've screened thousands of podcasts to find the ones of the highest quality that you will instruct, inspire, and enlighten you or your students.
http://www.learnoutloud.com/Podcast-Directory

American Memory Historical Collections
A gateway to primary source materials relating to the history and culture of the United States. This site from the Library of Congress offers more than seven million digital items from more than 100 historical collections.

Campus Alberta Repository of Educational Objects - CAREO
A free searchable, Web-based collection of 3,670 multidisciplinary teaching materials. The project is supported by the University of Alberta and the Canadian Network for the Advancement of Research in Industry and Education.

The Connexions Project
A freely accessible database of more than 1,000 educational content modules and curricula from Rice University. The site includes open-source software that allows users to "exploit the materials in the repository for their needs."

Consortium of Online Learning (COOL)
A learning object repository for high school courses in British Columbia developed by a consortium of 36 school districts. Includes 21 resources.

Federal Government Resources for Educational Excellence, FREE
Hundreds of free teaching and resources from more than 35 federal organizations. Resources include teaching ideas, learning activities, photos, maps, primary documents, data, paintings, sound recordings, and more.

FreeFoto.com
The largest collection of free photographs for private noncommercial use on the Internet.

The Gateway to Educational Materials (GEM)
A searchable database of more than 33,500 lesson plans, curriculum units and educational materials for all grade levels found on federal, state, university, nonprofit, and commercial Web sites. Sponsored by the U.S. Department of Education.

Humbal Humanities Hub
Hosted by England's University of Oxford, a catalogue of evaluated online resources in the humanities from the Resource Discovery Network. Topics include English, history, philosophy, history and philosophy of science, theology, religion and modern languages.

Learning about Learning Objects
This site aims to train faculty to develop learning objects and use them in their online courses. It includes 63 learning objects. Funded by the California Virtual Campus and developed by the San Diego Community College District.

LOLA – Learning Objects, Learning Activities
A pilot project in the sciences at Wesleyan University in which faculty will develop interactive learning tools and animations that will help students visualize difficult concepts. These modules will be used in and out of the classroom.

Maricopa Learning Exchange
A warehouse of 722 learning "packages" - ideas, examples, and resources that support student learning at the Maricopa Community Colleges.

Merlot
A free and open resource designed for higher education faculty and students with links to nearly 10,000 online learning materials are collected here along with annotations such as peer reviews and assignments. The searchable database is divided into the subject areas of arts, business, education, humanities, mathematics, science and technology, and social sciences. The site is sponsored by a consortium of colleges, universities and statewide systems.

MIT Open Courseware
Free, searchable access to Web sites, syllabi, assignments, and other course materials for more than 500 courses developed by faculty at the Massachusetts Institute of Technology.

Wisconsin Online Resource Center
More than 1,000 learning objects created by 188 faculty from the Wisconsin Technical College System in the areas of adult basic education, English as a second language, business, general education, health, professional development, service, and technical courseware.

World Lecture Hall
Links to course materials for university-level courses from around the world. Some courses are delivered entirely online, while others are designed for students in residence. Divided into 83 categories. Note this site is currently being updated.

Other Learning Object Repositories
The Merlot Web site contains a catalog of learning object repositories. Go to their advanced search screen and choose Material Type = Collection to see all of the collections of learning objects within Merlot.

American Memory Historical Collections This site from the Library of Congress offers more than seven million digital items from more than 100 historical collections. See http://memory.loc.gov/ammem

Web Resources by Discipline:

Arts

• Emile Berliner and the Birth of the Recording Industry - provides more than 500 letters, lectures, photos, articles, and sound recordings related to the birth of the recording industry. Hear auctioneers, animal calls, musical instruments, and Native American songs, Italian songs, Swedish songs, and more. Berliner (1851-1929), an immigrant and self- educated man, was responsible for the development of the microphone, flat recording disc and gramophone player. (Library of Congress) http://memory.loc.gov/ammem/berlhtml/berlhome.html

• Leonard Bernstein: An American Life a guide to an 11-part documentary illuminating the life and work of one of America's greatest classical musicians, Leonard Bernstein (1918-1990). An audio overview -- and Web sites for learning about Bernstein and classical music -- are provided. (National
  Endowment for the Humanities) See http://wfmt.com/bernstein/

• Moldenhauer Archives presents 130 music manuscripts, letters, and materials from a 3,500-item collection documenting the history of Western music from the medieval period through the modern era. Essays by musicologists discuss items from Bach, Beethoven, Brahms, Chopin, Handel, Liszt, Mozart, Schoenberg, Stravinsky, and other composers. (Library of Congress) See
  http://memory.loc.gov/ammem/collections/moldenhauer/

• NEA Jazz in the Schools traces the history of jazz from its birth in New Orleans to the swing era, bebop, and new frontiers. Five lessons include essays, videos, photos, and nearly 100 music clips of Scott Joplin, Jelly Roll Morton, Louie Armstrong, Fletcher Henderson, Duke Ellington, Count Basie, Charlie Parker, Bud Powell, Miles Davis, Charlie Mingus, Sonny Rollins, John Coltrane, and others. Lessons include social and political context and are designed for history classes as well as music. (National Endowment for the Arts) See http://media.jalc.org/nea/home.php

Science

• The Chemistry of Health tells how chemistry and biochemistry are increasing
  our understanding of human health. Learn how biochemical relays keep our
  organ systems operating, how food is broken down and used to build tissues
  and organs, and how tiny biological probes and instruments can track single
  molecules. Topics in the 60-page booklet include folic acid, sugars and
  fats, DNA, making medicines, harnessing biology's magic, and more. (National
  Institutes of Health) See http://publications.nigms.nih.gov/chemhealth/

• Earth and Environmental Science: Research Overview examines questions that
  scientists are pursuing: What part do we play in earth's changing climate?
  What can rock layers tell us about earth's history? How can we understand
  the forces that lead to earthquakes and volcanoes? How can organisms live
  without sunlight? How do long-term changes affect earth's ecosystems?
  (National Science Foundation) See
  http://www.nsf.gov/news/overviews/earth-environ/index.jsp

• Exploring the Environment features 25 online modules that put students in
  problem-based learning scenarios. In one module, students predict the impact
  of increased carbon dioxide on the wheat yield in Kansas. In another, they
  predict weather 48 hours in advance. Topics include coral reefs, climate
  change, the Everglades, mountain gorillas, rainforests, volcanoes, water
  quality, and ozone depletion. (National Aeronautics and Space
  Administration) See http://www.cet.edu/products/ete/overview.html

• Inside the Cell takes students on a close-up tour of the processes occurring
  in our bodies. Learn about the cell's brain and skeleton, cellular rush
  hour, and the death of a cell. Find out about lysosomes (cell recycling
  centers and garbage trucks) and mitochondria (cell power plants). Read about
  cutting-edge cell biology research and techniques, which are featured in the
  80-page booklet. (National Institutes of Health) See
  http://publications.nigms.nih.gov/insidethecell/

• NASA Connect: Sun-Earth Day features teacher guides and other resources for
  studying sun-earth connections and celebrating Sun-Earth Day. In "Ancient
  Observatories," students measure the movement of the sun and find solar
  noon. In "Venus Transit," students learn about scale models and the
  "astronomical unit," which is used to determine distances from the earth to
  other planets and stars. In "Dancing in the Night Sky," students learn about
  the Aurora Borealis, or Northern Lights. (National Aeronautics and Space
  Administration) See http://sunearthday.nasa.gov/2006/events/broadcasts.php

• Path of Totality: Measuring Angular Size and Distance examines the natural
  phenomena that create a total eclipse. NASA scientists and engineers
  introduce a satellite used to make artificial eclipses in order to learn
  about the sun's corona. Students measure the angular size and predict the
  angular distance of objects in the sky. (National Aeronautics and Space
  Administration) See
  http://connect.larc.nasa.gov/programs/2005-2006/path_of_totality/

• Physics Education Technology (PhET) produces fun, interactive simulations of
  physical phenomena. More than 35 simulations let students experiment with
  circuits, string tension, kinetic and potential energy, radio waves and
  electromagnetic fields, balloons and static electricity, ideal gas and
  buoyancy, velocity and acceleration, sound waves and the Doppler effect, and
  more. (National Science Foundation) See
  http://www.colorado.edu/physics/phet/

• Physics to Go is a collection of reviewed resources for teaching and
  learning about astronomy, electricity and magnetism, fluids, light, modern
  physics, motion and energy, quantum physics, and waves and pendula.
  (National Science Foundation) See http://www.compadre.org/informal/index.cfm

• The Structures of Life takes us into the world of "structural biology" -- a
  branch of molecular biology that focuses on the shape of nucleic acids and
  proteins (the molecules that do most of the work in our bodies). Learn about
  the structures and roles of proteins, tools used to study protein shapes,
  how proteins are used in designing new medications (for AIDS and
  arthritis), and what structural biology reveals about all life processes.
  Find out about careers in biomedical research. (National Institutes of
  Health) See http://publications.nigms.nih.gov/structlife/

• Sun-Earth Day is a series of programs and events throughout the year that
  culminates with a celebration of the spring equinox. "Eclipse: In a
  Different Light," this year's theme, shows how eclipses have inspired people
  to study the sun-earth-moon system. Join this journey of exploration and
  discovery in preparation for a total solar eclipse. (National Aeronautics
  and Space Administration) See http://sunearthday.nasa.gov/

• Teach the Earth offers hundreds of teaching activities, visualizations, and
  resources for teaching earth science. Categories include biosphere, climate
  change, energy/material cycles, geology and human health, geochemistry,
  hydrosphere and cryosphere, mineralogy, ocean systems, petrology, solar
  system, and earth history. Special sections are provided on using data and
  teaching quantitative skills. (National Science Foundation) See
  http://serc.carleton.edu/index.html

• Water on the Web offers water science units and tools that help students
  understand and solve real environmental problems using advanced technology.
  Learn about aquatic ecology, water quality, and watersheds. See maps,
  summaries, and information on lakes and rivers nationwide. Use data
  visualization tools to watch data change through time and explore
  relationships among variables. (National Science Foundation) See
  <http://waterontheweb.org/> http://waterontheweb.org/

• CERN, the World's Largest Particle Accelerator - features scientists and machines that explore the universe's tiniest particles. Follow a proton through the accelerator. Meet scientists at CERN. Hear why they search for the secrets of matter. Learn about the antimatter, the Big Bang, and other ‘big ideas’ behind experiments at CERN. (National Science Foundation) http://www.exploratorium.edu/origins/cern/index.html

• Hubble, a View to the Edge of Space - looks at the people, tools, ideas, and places of the Hubble Space Telescope. See how scientists on earth talk to the telescope in space. Dissect Hubble's images and see what they tell us about the universe. Take a tour of Hubble, from the telescope to the control rooms. (National Science Foundation) http://www.exploratorium.edu/origins/hubble/index.html

• Origins - lets us look over the shoulders of scientists and glimpse the often-unseen moments of investigation. Take ‘virtual field trips’ to eight observatories: Arecibo, where astrobiologists search for signs of life beyond the solar system; Las Cuevas, a research station in Central America's largest remaining rainforest; and others. See interviews, photos, and broadcasts that explore the origins of matter, the universe, and life itself. (National Science Foundation) http://www.exploratorium.edu/origins/index.html

• Science of Music - invites children of all ages to explore the ‘science of music’ through movies, questions, and online exhibits. Compose, mix, and play with music in ways you probably haven't before. Find out what makes sad music sad, why some songs get stuck in your head, and how opera singers are able to sing notes that seem to last forever. (National Science Foundation) http://www.exploratorium.edu/music/index.html

• Astro-Venture - provides interactive tutorials on biology, geology, astronomy, and atmospheric sciences. Biology topics include ecosystems, energy, producers and consumers, and the cycle of matter. Geology topics include the effects of heat and pressure on states of matter, density, convection, plate tectonics, volcanoes, the carbon cycle, earth's magnetic field, and radiation. (National Aeronautics and Space Administration - NASA) http://astroventure.arc.nasa.gov

• Engineering Design Challenges - offers students the chance to tackle challenges faced by NASA engineers who are developing the next generation of aerospace vehicles. The challenges: thermal protection systems, spacecraft structures, electrodynamic propulsion systems, propellers, and personal satellite assistants. Students design, build, test, re-design, and re-build models that meet specified design criteria, using the same analytical skills as engineers. (National Aeronautics and Space Administration - NASA) http://edc.nasa.gov/

History

• Bound for Glory: America in Color is the first major exhibit of 70 color
  prints (1939-1943) showing the effects of the Depression on people in rural
  America and small towns, the nation's subsequent economic recovery, and the
  mobilization for World War II. (Library of Congress) See
  http://www.loc.gov/exhibits/boundforglory/

• The Development of the Industrial United States (1870-1900) offers documents
  and images for learning about Bell's patent for the telephone, Edison's
  patent for the electric lamp, Glidden's patent application for barbed wire,
  the Homestead Act of 1862, maps of Indian territory, child labor, and the
  Chinese Boycott Case. (National Archives and Records Administration) See
  http://www.archives.gov/education/lessons/industrial-us.html

• The Emergence of Modern America (1890-1930) features the 1897 petition
  against the annexation of Hawaii, political cartoons on progressivism and
  the 1912 election, woman suffrage and the 19th Amendment, the Zimmermann
  telegram (1917), photos of the 369th Infantry, posters from the Food
  Administration during World War I, the Volstead Act and prohibition
  documents, and the unfinished Lincoln Memorial. (National Archives and
  Records Administration) See
  http://www.archives.gov/education/lessons/modern-america.html

• Great Depression: Dust Bowl Migration includes photos, a teachers guide, and
  other resources for learning about the largest migration in American
  history. This migration occurred in the 1930s when poor soil conservation
  practices and extreme weather in the Great Plains exacerbated the existing
  misery of the Great Depression. (Library of Congress) See
  http://memory.loc.gov/learn/community/cc_greatdepression_kit.php

• Hotchkiss Map Collection: Confederate Army Maps contains maps made by Major
  Jedediah Hotchkiss (1828-1899), a topographic engineer in the Confederate
  Army. Hotchkiss created detailed battle maps of the Shenandoah Valley; some
  were used by Generals Lee and Jackson. The collection includes maps from
  post-war years -- maps with information about railroads, minerals and
  mining, geology and history (mostly of Virginia and West Virginia). (Library
  of Congress) See http://memory.loc.gov.ammem/collections/maps/hotchkiss/

• Idea of America Essay Contest invites high school juniors to write an essay
  examining the historical debate over the benefits and disadvantages of
  adopting the First Amendment. While its words are familiar, the rights it
  guarantees -- involving religion, speech, free press, public assembly, and
  petition -- were modified many times in the First Congress (1789). Essays
  must be received by April 19, 2006. The best essay will receive $5,000.
  Three runners-up will each receive $1,000. (National Endowment for the
  Humanities) See http://www.wethepeople.gov/essay/index.html

• Smithsonian Source: Colonial America offers primary sources and tools for
  using them in the classroom. Watch an anthropologist examine skeletons for
  clues to daily life in Jamestown. Find lessons on the Boston Massacre, Stamp
  Act, patriot women, Pocahontas, and money. Use questions -- built around
  primary documents -- to explore the clashing views of revolutionary
  colonists and loyalist colonists. Examine the political, religious,
  economic, and social reasons for the Revolution. (Smithsonian Institute) See
  http://www.smithsoniansource.org/display/topic/viewdetailshis.aspx?TopicId=1
  004

• Texas Beyond History is a virtual museum of online exhibits, lessons, and
  interactive learning that covers 13,500 years of human history in Texas,
  from Clovis hunters to 20th century cotton farmers. Explore archeological
  sites and historic landmarks. See rare photos, maps, artifacts, and
  reconstructed scenes of the past -- more than 6,000 images. (National
  Endowment for the Humanities) See http://www.texasbeyondhistory.net

• World War II Military Situation Maps, 1944-1945 contains maps showing troop
  positions beginning on June 6, 1944, to July 26, 1945. Starting with the
  D-Day Invasion, the maps give daily details on the military campaigns in
  Western Europe, showing the progress of the Allied Forces as they push
  towards Germany. Some of these 416 maps and 115 reports were used by U.S.
  commanders. (Library of Congress) See
  http://memory.loc.gov/ammem/collections/maps/wwii/

Social Studies

• Islamic Manuscripts from Mali showcases 22 manuscripts from Timbuktu and the
  surrounding regions of Mali and West Africa, enabling students to understand
  the rich culture and society of the region. Especially noteworthy are the
  extensive collections of photos showing the domestic architecture, the
  characteristics of Islamic manuscripts, and an array of interactive maps
  made in Europe beginning in the 16th century. (Library of Congress) See
  http://international.loc.gov/intldl/malihtml/malihome.html

• Herblock's History - features 150 cartoons by Herb Block, the editorial cartoonist who chronicled our political history for The Washington Post from 1929 through 2000. Cartoons are organized chronologically and accompanied by explanations of events that inspired them. Topics include the Depression, fascism in Europe, Nazi aggression, the nuclear arms race, 12 presidents (from Hoover to Clinton), and more. The cartoon in which Block coined the phrase ‘McCarthyism’ is included. (Library of Congress) http://www.loc.gov/rr/print/swann/herblock/

• Lewis and Clark - offers maps, manuscripts, timelines, and photos related to the famed expedition. It includes resources for learning about Meriwether Lewis, Sacagawea, Congress's role in the Louisiana Purchase, and Thomas Jefferson's life-long commitment to western exploration. (Library of Congress) http://memory.loc.gov/learn/community/cc_lewisandclark.php

• Tinker, Tailor, Farmer, Sailor - is a lesson in which students use primary sources to determine why Europeans settlers were drawn to particular regions of America. Among the geographic conditions they consider: access to water, arable land, natural resources, and the growing season. The lesson focuses on New England, the South, and Middle Atlantic colonies. (Library of Congress) http://memory.loc.gov/ammem/ndlpedu/lessons/01/tinker/index.html

• Tracking Down the Real Billy the Kid - is a lesson in which students learn about the role of gunfighters in the settling of the West and analyze interviews with people who knew William H. Bonney, better known as Billy the Kid. (Library of Congress) http://memory.loc.gov/ammem/ndlpedu/lessons/99/billy/index.html

• Woodrow Wilson and the Birth of the American Century - is the companion website for a film about our 28th President. Discover the issues that made the 1912 election important. Learn how Wilson opposed U.S. entrance into World War I, but how ultimately he committed the nation to war. Examine the impact of Wilson's presidency through the eyes of historians. A teacher's guide provides lessons on women's suffrage, Wilson and African Americans, the 1912 election, and World War I. (National Endowment for the Humanities) http://www.pbs.org/wgbh/amex/wilson/

• World History Matters - offers guides and model strategies for analyzing images, maps, newspapers, and other primary sources. Case studies, written by teachers, discuss the teaching of 16 primary sources, from Hammurabi's Code to 20th century Great Britain. A guide to ‘100 top online primary source archives’ presents resources by region (e.g., Africa, Europe) and time period (e.g., early civilization, revolutions). (National Endowment for the Humanities) http://chnm.gmu.edu/worldhistorymatters/

• Liberty Ships and Victory Ships, America's Lifeline in War - tells the story of two World War II ship-building efforts. In 1941, with war raging in Europe, President Roosevelt authorized the production of 441-foot cargo ships. These ‘Liberty ships’ proved too slow and small, so in 1943, a new effort began building ‘Victory ships,’ which cruised at 18.5 mph, compared to the Liberty's 12.5 mph. By the war's end, 2,751 Liberty and 531 Victory ships had been built. (Nat'l Park Service, Teaching with Historic Places, Nat'l Register of Historic Places) http://www.cr.nps.gov/nr/twhp/wwwlps/lessons/116liberty_victory_ships/116liberty_victory_ships.htm

• Madison's Treasures - offers documents from our fourth President, James Madison. Most relate to two events: the drafting and ratification of the Constitution (1787-8) and the introduction in the First Federal Congress of the amendments (1789) that became the Bill of Rights. Other documents relate to the freedom of religion and the burning of Washington, D.C., by the British in 1814 -- perhaps the major embarrassment of Madison's career. (Library of Congress) http://www.loc.gov/exhibits/madison/ 

• A Nation Repays Its Debt: The National Soldiers' Home and Cemetery in Dayton, Ohio - tells how the federal government created a network of ‘soldiers' homes’ and national cemeteries to honor Civil War veterans. The 110-acre Dayton cemetery contains the remains of veterans from the Revolutionary War, the Civil War, the War of 1812, the Mexican War, the Spanish American War, and all 20^th century military conflicts. (Nat'l Park Service, Teaching with Historic Places, Nat'l Register of Historic Places) www.cr.nps.gov/nr/twhp/wwwlps/lessons/115dayton/115dayton.htm 

• The Penniman House: A Whaling Story - focuses on one of the most successful whaling captains in New England. Edward Penniman was 11 in 1842 when he signed on as cook on a schooner. Years later, as a captain, he set sail from New Bedford seven times to hunt whales. The trips generally took several years each. Letters indicate he did not like life at sea, but the money allowed him to afford a large ornate house, which is featured at this site, along with a brief a history of whaling in America. (Nat'l Park Service, Teaching with Historic Places, Nat'l Register of Historic Places) www.cr.nps.gov/nr/twhp/wwwlps/lessons/112penniman/112penniman.htm 

• Rivers, Edens, Empires: Lewis and Clark and the Revealing of America - looks at historical maps, relations with Indians, and expedition artifacts -- the blunderbuss, Jefferson's secret message to Congress, his instructions for Meriwether Lewis, and speeches. Subsequent expeditions of America are also examined, including those by Lieutenant Zebulon Pike, Thomas Freeman, Major Stephen Long, Father de Smet, and John Fremont. (Library of Congress) http://www.loc.gov/exhibits/lewisandclark/lewisandclark.html 

• Reflections: Russian Photographs, 1992-2002 - shows photos from the years following the collapse of the Soviet Union. Images include protests and religious ceremonies, soldiers and workers, Red Square and Siberia, reindeer breeders and ice fishermen, Boris Yeltsen, the Kursk nuclear submarine disaster, and more. The photos were shot for the ‘Moscow Times,’ the first English language daily newspaper ever printed in Russia. (Library of Congress) http://www.loc.gov/exhibits/reflections/ 

• The Siege and Battle of Corinth: A New Kind of War - tells the story of two Civil War engagements near Corinth, a small Mississippi town established in the 1850s where two railroads crossed. On October 2, 1862, Confederates attacked Union forces that occupied the town and that had built extensive entrenchments and earthworks (which are featured at this website). By nightfall the next day, 2,360 Union and 4,848 Confederate men were dead or wounded. (Nat'l Park Service, Teaching with Historic Places, Nat'l Register of Historic Places) www.cr.nps.gov/nr/twhp/wwwlps/lessons/113corinth/113corinth.htm 

• The United States Air Force Academy: Founding a Proud Tradition - recounts the history of aviation and the military: aviation's introduction into the military during World War I, Germany's use of air power early in World War II, Pearl Harbor, the Berlin Airlift, Hiroshima and Nagasaki, and President Eisenhower's declaration that our first line of defense would be an air atomic strike force. The site examines the design of the Air Force Academy, authorized in 1954 after 30 years of struggle. (Nat'l Park Service, Teaching with Historic Places, Nat'l Register of Historic Places) www.cr.nps.gov/nr/twhp/wwwlps/lessons/114airforce/114airforce.htm 

• Voices for Votes - involves students in examining primary source documents related to the women's suffrage movement. Students identify methods used to change attitudes about suffrage for women and then create original documents encouraging citizens to vote in current elections. (Library of Congress) http://www.loc.gov/ammem/ndlpedu/lessons/00/suffrage/ 

• War and Peace - exhibits photos, maps, and documents related to America's wars. Features include a Civil War timeline, letters from soldiers, homefront contributions during World War I and II, American women workers during World War II, man-on-the-street interviews after Pearl Harbor, ‘The Stars and Stripes’ newspaper (for Army troops in France 1918-19), Winston Churchill, the Marshall Plan, Ansel Adam's book of photos of a World War II internment camp, and the Veterans History Project. (Library of Congress) http://memory.loc.gov/learn/community/cc_warandpeace.php 

• We the People - features drafts of the Declaration of Independence and the Gettysburg Address, papers of George Washington and Thomas Jefferson, an Emancipation Proclamation timeline, slave codes, images of presidential inaugurations, how elections have changed, documents on policies aimed to keep peace between white settlers and Native Americans (1783-1815), duties of the President and other governmental officials in 1825, the role of religion in the founding of the colonies, and more. (Library of Congress) http://memory.loc.gov/learn/community/cc_wethepeople.php 

• Witness and Response: September 11 Acquisitions - presents photos, prints, eye-witness accounts, headlines, books, magazines, songs, maps, and videotapes related to September 11, 2001. Photos of ground zero taken during and after the attacks by news photographers in New York City are included, as are press reactions from around the world. The role maps played in the recovery effort is examined. (Library of Congress) http://www.loc.gov/exhibits/911/ 

• Zoom into Maps - offers hundreds of historical maps -- maps showing European exploration of the Americas; migration, population, and economic activity; the growth of roads, railways, canals, river systems, telephone systems, telegraph routes, and radio coverage; landforms, recreational, and wilderness areas; troop movements, battle routes, and campsites during major U.S. military conflicts; and more. The collection features a 2003 map of U.S. congressional districts. (Library of Congress) http://memory.loc.gov/learn/features/maps/index.html

• Calculus on the Web offers an interactive environment for learning, practicing, and experimenting with the ideas and techniques of calculus. It is organized in seven parts: Precalculus; Calculus I, II, and III; Linear Algebra; Number Theory; and Abstract Algebra. (National Science Foundation) See http://www.math.temple.edu/%7Ecow/
• Mathematics: Research Overview looks at topics of major research in
  mathematics: image creation, statistics, inverse problems, CPU testing,
  materials and nanotechnology, proteins, random graphs, prime numbers,
  optimization, design, financial mathematics, weather and climate simulation,
  rare events, and high-dimensional data sets. (National Science Foundation)
  See http://www.nsf.gov/news/overviews/mathematics/index.jsp