Second, the study relied on teacher evaluations, and teachers may not be reliable judges of friendships among their charges.
其次，此前研究主要依赖老师的评估结果，负责这些孩子的老师，对孩子间交往评估也许有偏差。
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Mr. Silver's comments come as momentum appears to build for shielding teacher evaluations from public scrutiny.
WSJ: Albany Eyeing Ways to Shield Teacher Data
Mayor Michael Bloomberg has been a steadfast advocate for publicizing the results of teacher evaluations.
They are free to set their own guidelines for curriculum, teacher evaluations and lengths of school days.
CNN: Documentaries spark education debate
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