学校数学教研组实施“分层施教，合作达标”教学法。
The school mathematics "layer teaching, and implementation of educational research group cooperation standard" teaching method.
采用分层抽样方法，对36所学校、156间教室进行卫生学调查。
Hygiene investigation was carried out in 156 classrooms of 36 schools with stratification sampling.
学校采取分层次教学的措施，给《微积分》课程的教学改革注入了活力。
The school takes and divides the teaching measure of the level, has injected vigor into reform in education of " calculus " course.
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