为了了解全美中小学生在核心课程中的学习成绩，美国建立了全国教育进展评估。
In order to be informed of national primary and secondary students achievements in the core curriculums, national Assessment of Educational Progress (NAEP) was established in America.
2015年，核心国家课程标准已经在美国很多地区推行，正处于初步阶段，这在一定程度上会影响到最近的全美教育进展评估成绩。
The Common core State Standards were in their beginning phases of implementation in many places in 2015, which could have impacted the latest NAEP scores.
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