Are all atoms of an element the same? How can you tell one isotope from another? Use the sim to learn about isotopes and how abundance relates to the average atomic mass of an element.

Students learn how civil rights activists including the Freedom Riders, state and local officials in the South, and the Administration of President Kennedy come into conflict during the early 1960s.

This lesson provides students with an opportunity to study and analyze the innovative legislative efforts of Presidents Kennedy and Johnson in the social and economic context of the 1960s.

In this lesson, students analyze Jacob Lawrence'sThe Migration of the Negro Panel no. 57(1940-41), Helene Johnson's Harlem Renaissance poem"Sonnet to a Negro in Harlem"(1927), and Paul Laurence Dunbar's late-nineteenth-century poem"We Wear the Mask"(1896), considering how each work represents the life and changing roles of African Americans from the late nineteenth century to the Harlem Renaissance and The Great Migration.

Even in its first 30 years of existence, the U.S. Constitution had to prove its durability and flexibility in a variety of disputes. More often than not, James Madison, the "Father of the Constitution," took part in the discussion.

Learn about the effects that the Second World War had on jazz music as well as the contributions that jazz musicians made to the war effort. This lesson will help students explore the role of jazz in American society and the ways that jazz functioned as an export of American culture and a means of resistance to the Nazis.

Explore the philosophical contributions that Benjamin Franklin and Thomas Jefferson made to the movement for American independence. The lesson introduces students to some of the important precursor documents, such as Franklin's Albany Plan of 1754 and Jefferson's Draft of the Virginia Constitution, that led to the Declaration of Independence and the Constitution.

If James Madison was the "father" of the Constitution," John Marshall was the "father of the Supreme Court""”almost single-handedly clarifying its powers. This new lesson is designed to help students understand Marshall's brilliant strategy in issuing his decision on Marbury v. Madison, the significance of the concept of judicial review, and the language of this watershed case.

Students align original FSA photographs from the 1930s and the author's own journal entries, to trace parallel elements John Steinbeck then incorporated into passages in The Grapes of Wrath.

Make sparks fly with John Travoltage. Wiggle Johnnie's foot and he picks up charges from the carpet. Bring his hand close to the door knob and get rid of the excess charge.

Curriculum unit on the historical  context of Upton Sinclair's novel The Jungle and how the book helped reform efforts in Congress to pass the Meat Inspection Act and the Pure Food and Drug Act in 1906.

In this curriculum unit, students will explore how Chopin stages the possible roles for women in Edna's time and culture through the examples of other characters in the novella.

In 1950, North Korean forces, armed mainly with Soviet weapons, invaded South Korea in an effort to reunite the peninsula under communist rule. This lesson will introduce students to the conflict by having them read the most important administration documents related to it.

Three simple and age appropriate activities on Spanish language and culture which focus on the family and the Spanish names for various family members.

Learn about position, velocity and acceleration vectors. Move the ladybug by setting the position, velocity or acceleration, and see how the vectors change. Choose linear, circular or elliptical motion, and record and playback the motion to analyze the behavior.

Join the ladybug in an exploration of rotational motion. Rotate the merry-go-round to change its angle, or choose a constant angular velocity or angular acceleration. Explore how circular motion relates to the bug's x,y position, velocity, and acceleration using vectors or graphs.

Join the ladybug in an exploration of rotational motion. Rotate the merry-go-round to change its angle, or choose a constant angular velocity or angular acceleration. Explore how circular motion relates to the bug's x,y position, velocity, and acceleration using vectors or graphs.

A curriculum unit of three lessons in which students explore Hopi place names, poetry, song, and traditional dance to better understand the ways Hopi people connect with the land and environment through language. The unit is centered on the practice of growing corn. Students make inferences about language, place, and culture and also look closely at their own home environment and landscape to understand the places, language, and songs that give meaning to cultures and communities

Create a laser by pumping the chamber with a photon beam. Manage the energy states of the laser's atoms to control its output.

Create a laser by pumping the chamber with a photon beam. Manage the energy states of the laser's atoms to control its output.