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The Gateway to 21st Century Skills, or GEM (from the organization's former name, Gateway to Educational Materials) provides teachers with quality resource and tools from federal, state, university, nonprofit and commercial internet sites. The GEM catalog is browseable and searchable by subject, type of resource, grade level, keyword, and several other parameters. The site also includes the Achievement Standards Network, a repository of learning standards documents for K-12 education from departments of education in all 50 states plus standards from nationally recognized content groups.
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