The first of these word problems is a multiplication problem involving equal-sized groups. The next two reflect the two related division problems, namely, "How many groups?" and "How many in each group?"

The purpose of this task is to show three problems that are set in the same kind of context, but the first is a straightforward multiplication problem while the other two are the corresponding "How many groups?" and "How many in each group?" division problems.

This article provides an overview of the types of glaciers, glacial formation, movement and retreat, and how scientists are studying glaciers and their response to climate change.

This hands-on activity explores five different forms of erosion (chemical, water, wind, glacier and temperature). Students rotate through stations and model each type of erosion on rocks, soils and minerals. The students record their observations and discuss the effects of erosion on the Earth's landscape. Students learn about how engineers are involved in the protection of landscapes and structures from erosion. Math problems are included to help students think about the effects of erosion in real-world scenarios.

This task gives students an opportunity to work with volumes of cylinders, spheres and cones. Notice that the insight required increases as you move across the three glasses, from a simple application of the formula for the volume of a cylinder, to a situation requiring decomposition of the volume into two pieces, to one where a height must be calculated using the Pythagorean theorem.

OER An Introducotry Primer is a presentation that may be used to learn about or teach others about open educational resources. This presentation focuses on the basics of OER - what they are and are not, CC licensing, where to find them, and the 5 R's

Finding an Using OER is a presentation for those who are beginning to use OER; it has places to begin looking for quality OER, and ways to use found resources.

Planning Instructional Designs with OER is a presentation that implements OER selection and use into the instructional design model.

In this module, we are going to examine ways to create your own OER by adapting other open educational resources, building upon existing resources, and mixing and matching a variety of OER.

In this module, we are going to explore ways to create your own OER.

This module focuses on building a base understanding of what is Open Educational Resources. As you journey through this module there are rich content and opportunities to deepen your knowledge working independently or with thought partners. Here are the outcomes you will accomplish from completing this course.

Students build and observe a simple aneroid barometer to learn about changes in barometric pressure and weather forecasting.

Students are introduced to different ways of displaying visual spectra, including colored "barcode" spectra, like those produced by a diffraction grating, and line plots displaying intensity versus color, or wavelength. Students learn that a diffraction grating acts like a prism, bending light into its component colors.

In this activity, students will use cookies to simulate the distribution of our nonrenewable resources (energy). Then, they will discuss how the world's growing population affects the fairness and effectiveness of this distribution of these resources and how engineers work to develop technologies to support the population.

Students use water balloons and a length of string to understand how the force of gravity between two objects and the velocity of a spacecraft can balance to form an orbit. They see that when the velocity becomes too great for gravity to hold the spacecraft in orbit, the object escapes the orbit and travels further away from the planet.

The class forms a "Presidential Task Force" for a week, empowered by the president to find answers and make recommendations concerning the future of the national power grid. Task force members conduct daily debriefings with their research team and prepare a report and presentation of their findings for the president, using an actual policy document as a guide. Although this activity is geared towards fifth-grade and older students and Internet research capabilities are required, some portions may be appropriate for younger students.

Student teams locate a contaminant spill in a hypothetical site by measuring the pH of soil samples. Then they predict the direction of groundwater flow using mathematical modeling. They also use the engineering design process to come up with alternative treatments for the contaminated water.

This expository article, written for students in grades 4-5, explains why ice floats and how this is essential to life on earth. Modified versions are available for younger students.

This marbel counting iteration of greater than, less than, and equal to with a specific "target number" help strengthen the concept for students.