This activity provides instructions for using a flashlight and aquarium (or other container of water) to explain why the sky is blue and sunsets are red. When the white light from the sun shines through the earth's atmosphere, it collides with gas molecules with the blue light scattering more than the other colors, leaving a dominant yellow-orange hue to the transmitted light. The scattered light makes the sky blue; the transmitted light makes the sunset reddish orange. The section entitled What's Going On? explains this phenomena.

This resource is a free, downloadable audio file of short music clips to use for instruction.

This resource includes the sheet music, activity instructions, and audio files for "Bluebird, Bluebird" from the Elementary Songbook.

This resource is a free, downloadable audio file of short music clips to use for instruction.

Download this librarian’s guide to see how to implement Bluetrack activities in your library. This guide includes a list of what you’ll need, tips for choosing a theme, and ideas to run a library activity. Be sure to search eMedia for the Bluetrack Challenge Cards that accompany this resource.

Download these premade Bluetrack Challenge Cards to help you run an effective Bluetrack activity in your library or classroom. Be sure to also search for the "Bluetrack: A librarian's guide" resource in eMedia to support your use of these cards.

After reading several examples of how a published author incorporates facts in fiction writing, students research a topic of their choice and write fictional diary entries that incorporate factual information.

Andrew Branca, a high school student from Central Academy of Technology and Arts, in North Carolina talks about how he was inspired to write Boal after attending a summer theater workshop on Brazilian theater activist Augusto Boal. Cast members discuss what it was like to collaborate on the playwriting process and why they felt it was important to start a serious discussion on racism and Islamophobia.

Sensitive: This resource contains material that may be sensitive for some students. Teachers should exercise discretion in evaluating whether this resource is suitable for their class.

Boal is a play written and performed by high school students from the Central Academy of Technology and Arts in Monroe, North Carolina. Boal brings a variety of social issues to the stage, focusing on racism and Islamophobia.

The play was inspired by Augusto Boal, a Brazilian theater director, writer, and politician. Boal was the founder of the Theatre of the Oppressed, a theatrical group dedicated to creating political change.

The performance was taped as part of the High School Theatre Festival during the Southeastern Theatre Conference.

Sensitive: This resource contains material that may be sensitive for some students. Teachers should exercise discretion in evaluating whether this resource is suitable for their class.

The purpose of this task is for students to find different pairs of numbers that sum to 4.

The purpose of this task is to assess a student's ability to compute and interpret an expected value. Notice that interpreting expected value requires thinking in terms of a long-run average.

Throughout the day, your nervous system monitors and makes endless adjustments to your body's basic systems -- all to keep you alive. This interactive feature illustrates the complexity of such a task.

This microcredential represents educators' effective and consistent instruction on body image and eating disorders (anorexia, bulimia, binge-eating disorder). This is the second microcredential in the Nutrition Stack. This stack of microcredentials fulfills one of the requirements of a pathway for endorsement.

This task examines linear models for the boiling point of water as a function of elevation. Two sets of data are provided and each is modeled quite well by a linear function.

Dr. Michihiko Hachiya lived through August 6, 1945 when the atomic bomb was dropped on Hiroshim. He kept a diary of his experience. He served as Director of the Hiroshima Communications Hospital and lived near the hospital approximately a mile from the explosion's epicenter. His diary was published in English in 1955.

Join an American Indian Interpreter as they share how the founding fathers looked to native governments when establishing their new republic.

In this optics activity, learners examine how polarized light can reveal stress patterns in clear plastic. Learners place a fork between two pieces of polarizing material and induce stress by squeezing the tines together. Learners will observe the colored stress pattern in the image of the plastic that is projected onto a screen using an overhead projector. Learners rotate one of the polarizing filters to explore which orientations give the most dramatic color effects. This activity can be related to bones, as bones develop stress patterns from the loads imposed upon them every day.

This resource is a Nearpod lesson about the Bonney Butte HawkWatch site located in the Mt. Hood National Forest in Oregon. It was created as part of the Reimagine Teaching program by HawkWatch International. HawkWatch International is a non-profit organization in Salt Lake City, Utah that works to protect raptors and our shared environment through scientific research and public education.

The Great Salt Lake (GSL) is drying up and molecular biologist Bonnie Baxter’s message is the harbinger of environmental devastation to come. Her unprecedented research of the lake's two major food chains, brine shrimp and brine flies, shows that both are on the brink of collapse due to increased salinization as lake shorelines recede.

In this lesson, students will investigate how teenagers became a distinct demographic group with its own identity in the postwar years, and, in turn, how their influence helped push Rock and Roll into the mainstream. In so doing, they helped secure Rock and Roll's place as the most important popular music of the 20th century.