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                欧美2019高清hd

                We're a multi-disciplinary team helping to keep you ahead of the curve.
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                欧美2019高清hd

                One complete, research-based system providing an array of integrated curriculum, assessment, instructional effectiveness, communication, and reporting tools.
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                欧美2019高清hd

                One complete, research-based system for birth through age five providing early childhood educators with standards-based authentic assessment, lesson planning, and reporting tools.
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                Built on the principles of science and supported by research since 1986.

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