16%的8年级学生因为成绩差而被留级。
16 percent of eighth-graders were held back for poor performance.
童年早期，孩子受到同龄人的社交接纳度也预示了其五年级的成绩。
Social acceptance by peers in early childhood also predicted grades in fifth grade.
五年级学生的阅读成绩分数较低，导致其进入中学后成绩下降，进而导致高中毕业率下降40%。
Lower reading achievement scores and grades in fifth grade contributed to reduced grades in middle school and thereby contributed to a 40% lower high school graduation rate.
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