This short video and interactive assessment activity is designed to give fifth graders an overview of addition and subtraction of weights (metric units).

This short video and interactive assessment activity is designed to give fourth graders an overview of addition and subtraction of time.

This short video and interactive assessment activity is designed to teach fifth graders about subtracting decimals - word problems.

This short video and interactive assessment activity is designed to give fourth graders an overview of decimal addition.

This short video and interactive assessment activity is designed to teach fourth graders about lengths of specific segments (metric units).

This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting money with pictures in columns.

This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting money using words.

This is a video overview of addition word problems (to sums of 100) for first graders.

This short video and interactive assessment activity is designed to teach third graders an overview of mixed operations.

This short video and interactive assessment activity is designed to teach second graders an overview of mixed operations (numbers to 1,000).

This short video and interactive assessment activity is designed to teach second graders about mixed operations: addition and subtraction i - word problems.

Demonstrates how to add and subtract pieces of fruit using the numbers 5 and 3. [2:17]

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 short video and interactive assessment activity is designed to teach fourth graders about adding or subtracting lengths in one step (english units).

This short video and interactive assessment activity is designed to teach second graders about adding and subtracting (numbers up to 20) - word problems.

This short video and interactive assessment activity is designed to teach fourth graders about adding of compound units of length (english units).

This short video and interactive assessment activity is designed to teach fourth graders about adding and subtracting fractions - word problems.

This site provides students practice with the concept of adding and subtracting decimals. Students can learn about the topic by completing an interactive tutorial. Students can then take a ten question timed test to practice the skill.

Practice solving word problems by adding and subtracting fractions. The fractions used in these problems have like (common) denominators. 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.

The opioid epidemic continues to devastate communities across the United States. This collection of videos, including three from the NOVA documentary, Addiction, can be used to engage students with media, encourage science practices, and prompt discussions in the classroom. Through a series of video clips, a viewing guide for the video clips, and a community screening guide for the documentary, the collection will help students better understand opioids and the disease of addiction. This Collection includes: Video (4), Document (2) for Grades 6-8, 9-12.

NOVA Addiction is a film that explores the impact of the opioid epidemic on individuals and society, examines the neurobiology of opioid addiction, and discusses current harm reduction approaches and treatments and how they might be improved. This screening guide provides an overview of the history of the opioid crisis, a background essay on the science of addiction, frequently asked questions about opioid addiction, and a comprehensive list of additional resources. This resource also provides a detailed guide for organizing a screening of the film in your community, including discussion questions about the science and stories explored in the film, answers to common questions about opioid use and its impact, and a glossary of important terms. 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.