Giá trị của tấm bằng phổ thông trung học ở Mỹ
Cập nhật: 07:15 20/06/2007 GMT+7
Theo một một nghiên cứu do Education Week vừa công bố, khoảng 30% học sinh Mỹ không tốt nghiệp trung học đúng thời hạn. Điều đó có nghĩa là, nếu đi làm, họ cũng chỉ kiếm được những công việc cho thu nhập trên mức nghèo khổ một chút.
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