Use the triangle congruence criteria SSS, SAS, ASA, and AAS to determine that two triangles are congruent. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

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.

Use your spatial reasoning skills to calculate the surface area when given a 3D figure. This video focuses on a right rectangular prism and shows you how unit blocks can help you visualize, then calculate the surface area. This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers.

Solve two problems that apply properties of tangents to determine if a line is tangent to a circle.

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.

Solve two problems that apply properties of tangents to determine if a line is tangent to a circle.

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.

Given a problem involving spheres, the student will find the surface area and volume.

Use data from a spreadsheet to develop a science model in Google Drawings. Time to complete: 45-90 minutes

This illustrated essay from the NOVA Web site explains why the atomic structure of a diamond slows down light and produces a sparkle more brilliant than from any other colorless substance.

This video segment from Greater Boston examines whether environmental toxins may be to blame for a rare skin disease.

Demonstrates how to systematically find all the possible outcomes of rolling two dice in order to determine the probability of rolling doubles. [5:15]

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 segment from Curious, learn about creating energy from solar rays to meet the growing energy needs of the world. [6:09]

Learn how four factors -- temperature, wind, precipitation, and sunlight and clouds -- are present in different types of weather in this video gallery from WGBH. Weather factors are always changing and each unique combination of factors describes a different type of weather. Students can observe the various weather conditions in each video clip and find evidence of the four factors that describe the weather in each condition. An Activity, Background Essay, and Teaching Tips are provided.

This basic digital audio content package is intended to support educators in discovering new resources and lessons for grades 9-12. These resources could also be used to supplement technology and STEM lessons. 

Learn how to interpret and evaluate information online, whether you're reading an article, watching a video, or using social media.

Lessons include: (1) Judging Online Information. Use these strategies to judge information you read online. (2) Practice Evaluating a Webpage. Learn how to evaluate a website for credibility and content. (3) How to Read a Webpage. Use these tips for reading a webpage. (4) What is Sponsored Content?. Learn how to identify sponsored content. (5) What is Clickbait?. Learn more about clickbait and how it's used in today's high-tech world. (6) What is Targeted Advertising?. Learn more about how advertisers use targeted ads to try and sell products to Internet users. (7) How Ads and Clicks Shape the Internet. Learn how ads and click shaped the Internet into its current form with this free lesson.

In this free tutorial, you'll learn digital photography basics as well as some more advanced skills so you can take great pictures.

Lessons include: (1) Introduction to Digital Cameras. Get an introduction to digital cameras. (2) Getting to Know Your Camera. Get to know your camera better.

This video is a story about students who cheat in college. It looks at the many reasons why students commit academic dishonesty. [2:42] The module includes questions to think about and discuss and links for further research.

This basic digital video content package is intended to support educators in discovering new resources and lessons for grades 6-8. These resources could also be used to supplement technology and STEM lessons. 

This basic digital video content package is intended to support educators in discovering new resources and lessons for grades 9-12. These resources could also be used to supplement technology and STEM lessons. 

Demonstrates how to plot a triangle on a Cartesian grid after a dilation and with a scale factor of 1/2. [2:26]

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.

Dimension of the Column Space or Rank. Created by Sal Khan.

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.