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Earth Science, Physics, Chemistry for the 21st Century is a core curriculum created from three proven programs, making it the first truly integrated inquiry-based approach to science. The same pedagogy, the same editors, the same easy to follow format for your students. That is why this program will be as successful in the classroom as EarthComm, Active Physics, and Active Chemistry.

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The official site of the University of Massachusetts UMass System, including the President's Office and major departments. The UMass System includes UMass Amherst, Boston, Dartmouth, Lowell, and the Medical School in Worcester.

Scribd is a social publishing site, where tens of millions of people share original writings and documents. Scribd's vision is to liberate the written word.

Curriki, the online education community, is building the first website to offer free, open-source instructional materials for K-12. We have thousands of free worksheets, lesson plans, exams, project ideas and activities for English language arts, math, science, social studies, technology integration and other subjects. All of our educational material is contributed by teachers and partners and is free and open source.