This simple-looking problem reveals much about how well students understand unit fractions as well as representing fractions on a number line.

In this activity students will learn the basic concept of Global Positioning Systems (GPS) using triangulation and measurement on a small scale in the classroom. Students discover how GPS and navigation integrate mathematic and scientific concepts to create a standard for locating people and objects. This activity helps students understand both the need for and methods of navigation.

This short video and interactive assessment activity is designed to teach fourth graders about adding and subtracting - missing operation.

This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting - missing operation.

If you haven’t discovered already, there are myriad open resources that exist. Often the trouble lies in locating those that fit precisely what you need. We’ve broken down these resources with the intent of making the search process more efficient and effective. For each you’ll find a list of unique traits, licensing information, and an example of how to attribute the source. Click one of the media sources in the Find Resources sub-menu for the details.

Students create their own simple compasses using thread, needle and water in a bowl and learn how it works.

The purpose of this task is to have students work on a sequence of area problems that shows the advantage of increasingly abstract strategies in preparation for developing general area formulas for parallelograms and triangles.

We use digital media every day, from texting, streaming TV shows, and gaming all the way to using voice assistants or ordering our food online. For today's kids, it's a lot more than just "screen time." So how can we help students balance their online and offline lives? It starts with recognizing just how much media we use.

This task asks students to find and use two different common denominators to add the given fractions. The purpose of this question is to help students realize that they can use any common denominator to find a solution, not just the least common denominator.

This task asks students to use two different denominators to subtract fractions. The purpose of this is to help students realize that any common denominator will work, not just the least common denominator.

The web is full of questionable stuff, from rumors and inaccurate information to outright lies and so-called fake news. So how do we help students weed out the bad and find what's credible? Help students dig into why and how false information ends up online in the first place, and then practice evaluating the credibility of what they're finding online.

In this activity, the students will investigate a variety of plants and animals common to the Amazon through research. They will determine the plant or animal characteristics that make them edible or useful for the trip and learn to categorize them by comparing similarities and/or differences.

This short video and interactive assessment activity is designed to teach third graders about finding least common multiples (lcm).

Helping kids learn what makes different media choices healthy or not is a good start. But how do we help them actually make responsible choices in the real world? Give your students the opportunity to create a personalized media plan.

The objective of this module is to show the many ways you can quickly and easily find OER materials in OER Commons. This module, “Finding OER Materials,” is activity-based; you'll be guided through the process of finding OER materials you can start using in your teaching and learning.

In this task students have the opportunity to construct linear and exponential functions, including arithmetic and geometric sequences, given a graph, a description of a relationship, or two input-output pairs (include reading these from a table).

This short video and interactive assessment activity is designed to teach fifth graders about finding time using multiple steps - word problems.

This short video and interactive assessment activity is designed to teach fourth graders about finding time using multiple steps - word problems.

This short video and interactive assessment activity is designed to teach fourth graders about finding the total distance between two objects.