Students explore line(s) of symmetry in polygons during a hands-on activity and a Student Web Lesson. They build a wall of symmetrical shapes designed and drawn by students.

First graders identify different kinds of lines found in common shapes. They discover ways in which an artist utilizes lines in a painting.

Third graders discover geometric shapes by completing a series of games and activities. Using ropes with knots tied every foot, they make shapes such as squares, triangles, and hexagons. In pairs, 3rd graders use pattern blocks to...

In this perimeter worksheet, students complete a set of 10 short word problems that define certain measurements and ask for perimeter. A reference web site is given for additional activities.

Students examine new shape possibilities by combining two and four triangles using manipulatives.

Second graders identify congruent figures and match shapes using transformation. They work in groups, utilizing a worksheet imbedded in this plan to gain practice identifying congruent shapes.

Second graders use geoboards to model polygons and to practice finding lines of symmetry.

Students construct a barrel or other curvy container and then estimate and gauge its volume.

This essay provides an in-depth explanation of the events surrounding the New York Times' publishing of the Pentagon Papers during Richard Nixon's presidency. Included are audio clips of conversations between Nixon and various members of...

When is the freedom of the press more important than classified foreign policy information? The Pentagon Papers Trial attempts to answer this constitutional quandary. Included in this site is a summary of the trial, the actual Pentagon...

This site offers an extensive history of the 1971 Pentagon Papers case. Features include transcripts of President Nixon's tapes, White House phone conversations, memoirs, and other primary resources.

The Pentagon Papers are a history of United States' political and military involvement in Vietnam from 1945 to 1967. In 1971, Daniel Ellsberg released portions of the documents to the press. Forty years later, the complete set of...

E-book page on the final era of the Vietnam War in which the Pentagon Papers were released, protest and conflict over the war increased at home and Nixon's Vietnamization began. Questions for discussion, glossary and link to primary...

The 1971 leaking of the Pentagon Papers to the New York Times led to a Supreme Court case in which the government took the newspaper to court over publishing classified information about Vietnam War policy.

Transcripts of conversations with Daniel Ellsberg that go into detailed accounts of Vietnam, The Pentagon Papers, and more of Mr. Ellsberg's experiences.

The Pentagon Papers, a study of U.S. political and military involvement in Vietnam from 1945 to 1967, were leaked by whistleblower Daniel Ellsberg to the New York Times newspaper in March 1971 revealing that the US government had been...

The 1960's was a time of upheaval in America mainly led by young adults disenchanted with the government. Examine the influences of this movement and read an excerpt from the Port Huron Statement written by the SDS at the University of...

One of the most controversial proxy-wars of the Cold War was the Vietnam War. Lasting from 1955 to 1975, the North Vietnamese fought the South Vietnamese with the USSR's and America's respective support. This collection includes 9...

This site from The History Place is a comprehensive site about the events leading up to the Vietnam War and ending with the withdrawal of American troops. Excellent slide show with an array of images from the era.

An interview with James Goodale, the general counsel for "The New York Times" during the Pentagon Papers case, concerning the Pentagon Papers and the First Amendment.

Official website of Daniel Ellsberg. Many links, including a biography, interviews, and articles he has written.

This U.S. Supreme Court case allowed the publication of the "Pentagon Papers." The OYEZ resource provides an abstract containing a concise summary, an audio file, a link to the full text of the decision and a record of how the justices...

The text of the policy of sustained reprisal from "The Pentagon Papers," covers introductory remarks, an outline of the policy, the expected effect of sustained reprisal policy, and present action recommendations.

A biography of Neil Sheehan, a journalist who won the Pulitzer Prize for Non-Fiction for a book he wrote about his experience of the Vietnam War. Includes a profile, videos, and a photo gallery.