It is divided into several subject areas, i.e., space, technology, nature / environment, animals and humans, etc.. (newkidscenter.com)
Visit a school where teachers collaborate on projects that connect several subject areas to enhance learning. (edutopia.org)
The materials are also categorized into several subject areas, such as: earth science, history, life science, mathematics, physical science, space science, and technology. (educationworld.com)