Practice finding the areas of complex shapes that are composed of smaller shapes. 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.

Models how to break an irregular polygon into smaller composite shapes, calculate the area for each of those, then add all the amounts together to get the total area. [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.

Practice finding the areas of trapezoids. 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.

Video tutorial demonstrates how to find the area of a trapezoid using the formula A=(a+b)/2 x h. [4:47]

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.

Learn the formula for the area of a triangle, one half base times height. [5:29]

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.

Models how to calculate the area of a circle when the diameter is known. [4:02]

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.

Choose a public policy issue to research and argue your position in a presentation using Google Slides. Time to complete: 2-3 hours

This is a lesson from Richland Community College on arithmetic sequences. This site provides theories and examples for working with different problems of arithmetic sequences such as calculating the Sum and Difference of an arithmetic sequence.

Arrhenius definition of acids and bases. [7:50]

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.

The online home of award-winning PBS television series "Art:21" opens a window into the world of contemporary art and artists. Includes a lessons library, downloadable educator guides, examples of student-created projects inspired by the series, artist interviews, videos, and amazing slideshows of the works of dozens of working artists.

The complete AIM Buddy Project educator's guide to the social-emotional program complete with planning guides for the classroom.

Trading Cards give children access to lots of great insider info on the Arthur characters! Children can print, collect, and trade the cards. Start a discussion about people's likes and dislikes, with this activity from Arthur. Ask children what information they'd include on their own trading card.

Investigate a situation where math plays an important role in art. This video focuses on the equation to calculate the correct weights and distances of the components necessary to balance a mobile. This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers.

Learn about the rise of mass media and the popularity of the short story in this video [4:07] from the American Masters film Edgar Allan Poe: Buried Alive. Poe wrote more than seventy short stories and created his own set of rules for the genre. He is also credited as one of the first literary critics of American literature and the creator of detective fiction. Engage students with discussion questions, teaching tips, and a handout for the study of Poe's opening sentences, his way of grabbing the attention of readers.

What is the commutative property? Why not ask Lois. She knows all about math "lingo." A site where kids can find math definitions explained in "kid friendly" language.

Learn how to ask someone to be a reference for you. Time to complete: 45-90 minutes

A collection of commodities market analysts present their "tricks of the trade" highlighting the data reports they rely on to effectively analyze the markets. A video, essays about the market, commodities, cash marketing, etc. and a portion of discussion questions to attain students' understanding are provided. [5:37]

Request and collect feedback from your classmates using Google Forms. Time to complete: 45-90 minutes

At the end of this tutorial, the learner will be able to ask appropriate and effective questions to better understand a communication or situation. It is 1 of 3 in the series titled "Asking Clarifying Questions." [7:03] SL.9-10.1c Active Partic, SL.11-12.1c Questions/Part

In this video segment produced for Teachers' Domain, Andres Berrio, an associate scientist at Biogen Idec, discusses what he has done to succeed in the biotechnology field.