This video lesson from Khan Academy discusses the semocratic ideals in the Preamble to the US Constitution. This lesson is intended for students taking high school or college level American Government and Civics courses, including the AP Government course.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Sociology often looks at different age cohorts. A cohort is simply a group of people, but here we're looking specifically at different age groups or generations, because these people all lived through the same certain events through a certain time that affected their lives similarly.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

In this video segment adapted from Navajo Technical College, meet a dendroclimatologist who studies the relationship between precipitation and tree growth in the Navajo Nation.

Martin Dahl, a Danish scientist, does research on living things and non-living things. Come see what he discovers.

Isabella and Amalie are in Copenhagen, and they saw a periscope in the water. Join them, and find out what this is all about. This module discusses how to use a periscope, what light sources are, and how light impacts shadows.

Learn how to identify the dependent and the independent variables in a word problem. [2:09]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Demonstrates how to determine the equation represented by a linear relationship shown on a graph. [2:00]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Demonstrates how to plot dependent and independent variables on a line graph. [1:00]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Video tutorial uses examples and formulas to show how to derive displacement as a function of time, constant acceleration, and initial velocity. [9:57]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Polynomial identities can be used to explain or describe various things in math. For example, we can use identities to prove that the differences between consecutive square numbers (1,4,9) are consecutive odd numbers (1,3,5). [4:33]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This interactive lesson engages students in noticing the shape of (transverse) waves and learning how to describe and measure the amplitude and wavelength of waves.

Different techniques for writing detailed descriptions of an object are found on this page.

In this video from Nature, observe elephants trek across the desert to an isolated waterhole. [4:13]

Introduce yourself to your classmates by creating a poster you can print with Google Drawings. Time to complete: 45-90 minutes

Promote a community project by building a website with Google Sites. Time to complete: 45-90 minutes

Summarize and communicate information visually by creating an infographic in Google Drawings. Time to complete: 45-90 minutes

Recognize the words and actions of classmates by creating a digital badge for a scrapbook. Time to complete: 45-90 minutes

Design is part of almost everything we see and do. Learn new ways to see it, appreciate it, and think critically about how it affects you.

Lessons include: (1) Seeing Design. Learn to see past appearances and discover what really makes a design successful, useful, or valuable.

In this video from NOVA scienceNOW, learn how scientists detect potential signs of life on distant planets.