因为，这样做会让大部分差生流入教育质量最差的学校，导致社会不公平的情况加剧，对该国的整体教育质量会产生负面影响。

It found that this could trap the most disadvantaged students in the least successful schools, thereby exacerbating social inequality and negatively impacting a nation's overall performance.

youdao

美国教育考试服务中心(ets)是一家非营利性机构，致力于向全球的各类人士提供公正有效的测评、研究及相关服务，提高教育质量和公平性。

ETS is a nonprofit institution with the mission to advance quality and equity in education by providing fair and valid assessments, research and related services for all people worldwide.

youdao

美国教育考试服务中心(ets)是一家非营利性机构，致力于向全球的各类人士提供公正有效的测评、研究及相关服务，提高教育质量和公平性。

ETS is a nonprofit organization with the mission to advance quality and equity in education by providing fair and valid assessments, research and related services for all people worldwide.

youdao