One hundred metric tons of CO2 can accumulate in one acre of forest over time—that's a lot of carbon! In the activity, groups of middle school learners determine what makes forests important. They then solidify the concept by using a...

Everyone knows a tree makes a sound when it falls, but what do we know about dying trees? Class members learn background information about Laurel wilt disease from a teacher-led presentation. Team members work with partners to read and...

Reading snail mail is a great way to go back into history and to understand others' points of view. The resource, the second in a five-part unit, covers the Dreyfus Affair. Scholars, working in two different groups, read one letter and...

Nanofibers can be made through electrospinning or force spinning in order to reduce the negative impact on the environment. Pupils study the role of fibers and dye on the environment through a series of five hands-on activities. Then,...

Cooperative groups compare pairs of photos of Alaskan glaciers. They match a historical photo to the recent photo of the same glacier. The class discusses what conditions are necessary for glaciers to retreat. This abbreviated activity...

Darwin explained the connection between species of finches 150 years before scientists understood DNA. Technology and progressing science proved he was right, yet many struggle to understand how natural selection happens. Scholars use...