我觀察咗喺比較多問題嘅社區 任教嘅新老師 問下嗰啲老師學期尾 會唔會仍然喺度工作 而留得低嘅教師裡邊 邊個能夠最有效提高學生嘅學習成果 ？
I looked at new teachers who teach in problematic communities, and asked if those teachers would still be working here at the end of the semester, and who among the teachers with low retention would be most effective in improving student outcomes?