Method:The tuberculin test is carried on with 2u PPD-T and 5u PPD-B injected into the skin of students in the middle school.

方法：通过结核菌素皮肤试验对河南省部分中学生的非结核分枝杆菌感染情况进行了观察。

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The act requires states to test students in reading and math every year, and penalizes schools if they don't meet standards.

CNN: Democrats decry 'No Child Left Behind'

Some also expressed concern that not all students will have the necessary skills to take the exam on computer, and the new GED test won't be offered on paper.

WSJ: Revamped GED Faces First Big Challenge