This task presents a real-world problem requiring the students to write linear equations to model different cell phone plans. Looking at the graphs of the lines in the context of the cell phone plans allows the students to connect the meaning of the intersection points of two lines with the simultaneous solution of two linear equations.

Student groups compete to design a process that removes the most iron from fortified cereal. Students experiment with different materials using what they know about iron, magnets and forces to design the best process for removing iron from the cereal samples.

Students use balloons to perform several simple experiments to explore static electricity and charge polarization.

This problem includes a percent increase in one part with a percent decrease in the remaining and asks students to find the overall percent change. The problem may be solved using proportions or by reasoning through the computations or writing a set of equations.

In this task students use different representations to analyze the relationship between two quantities and to solve a real world problem. The situation presented provides a good opportunity to make connections between the information provided by tables, graphs and equations.

This task suggests methods of introducing and continuing choral counting in the classroom.

Teachers (and then students) lead the class in chanting numbers from 1 to 120.

The purpose of this task is for students to find different pairs of numbers that sum to 7.

This task is primarily about volume and surface area, although it also gives students an early look at converting between measurements in scale models and the real objects they correspond to.

Students use bearing measurements to triangulate and determine objects' locations. Working in teams of two or three, they must put on their investigative hats as they take bearing measurements to specified landmarks in their classroom (or other rooms in the school) from a "mystery location." With the extension activity, students are challenged with creating their own maps of the classroom or other school location and comparing them with their classmates' efforts.

Students observe and discuss a simple balloon model of an electrostatic precipitator to better understand how this pollutant recovery method functions in cleaning industrial air pollution.

This article continues an examination of each of the seven essential principles of climate literacy on which the online magazine Beyond Weather and the Water Cycle is structured. Principle 2 covers the complex interactions among the components of the Earth system. The author discusses the scientific concepts underlying the interactions and expands the discussion with diagrams, photos, and online resources.

This issue of the free online magazine, Beyond Penguins and Polar Bears, highlights resources that help elementary teachers learn about climate change and teach their students important foundational concepts.

This article assembles free resources from the Climate Change and the Polar Regions issue of the Beyond Penguins and Polar Bears cyberzine into a unit outline based on the 5E learning cycle framework. Outlines are provided for Grades K-2 and Grades 3-5.

In this career-oriented interview, readers are introduced to the manager of several farmer's markets in Portland, Oregon. Following a brief description of his job and the general operations of a farmer’s market, he explains why these venues are beneficial to the vendors, the customers and the environment. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.

An interview conducted with a building contractor provides insights into what it means to build an environmentally "green" house. This lesson is part of the Climate Kids website, a NASA education resource featuring articles, videos, images and games focused on the science of climate change.

This career-oriented interview features a home energy auditor. He describes his job responsibilities and offers tips for improving home energy efficiency. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.

Using her countywide program as an example, a recycling educator offers incentives for recycling by providing data on energy savings and explaining how her county in Michigan supports the program. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.

In this career-oriented interview, readers are introduced to a scientist who works primarily on wind energy. He explains the importance of wind farm placement planning. Images of architectural wind and a wind farm are included, along with a link to the Power Up game. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.

A landscaper explains, through an interview format, how it is possible to design and maintain yards and gardens that require very little water. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.