They were relatively inexpensive because they would work with a cluster of schools, but I've seen myself how they have really helped failing teachers become great ones.
他们相对来说费用更低，因为他们能在很多学校教学，我就亲眼见过他们是如何帮助那些菜鸟教师成长为出色的园丁的。
Methods Stratified cluster sampling was carried out to investigate 312 male physical education teachers aged over 35 years old in 160 primary and secondary schools in Jiaodong peninsula.
方法采用分层整群抽样方法，对胶东半岛160所中小学35岁以上的男性体育教师312人进行问卷调查。
Methods the sampled students, which were taken out from the all middle schools in Sanming city by means of randomized stratification cluster sampling, were investigated with AAT (adaptability test).
方法按整群、分层、随机的原则，采用学习适应性测验(中学生版)对全市中学进行抽样调查。
Methods A cluster stratified sampling method was used to choose 3 251 students from 60 classes in 10 middle schools, among which, 3 044 questionnaires were available.
方法按照分层随机整群抽样的方法，抽取蚌埠市10所中学60个班级的3 251名高中生为研究对象，获有效问卷3 044份。
Methods AIDS prevention and life skill training were developed among students in 20 middle schools. Evaluations were carried out before and after the education by cluster samplings.
方法对北京市20所中学学生进行预防AIDS健康教育和生活技能培训，在培训前、后采用整群抽样方法获取样本进行评估。
Methods 1421 students from 4 high middle schools in Puyang City were selected to undergo a questionnaire survey by cluster random sampling.
方法采用整群抽样方法，对濮阳市4所高中的1421名学生进行问卷调查。
Methods A cluster sample of 8 054 students(aged 12-18 years) were chosen from 28 middle schools in Guangzhou.
方法采取整群抽样方法，对广州市28所中学12~18岁的中学生8 054名进行吸烟状况的问卷调查。
Methods By using the cluster sampling method, a sample of 518 students drawn from 4 high schools in Chuzhou, then a questionnaire survey was conducted among them.
方法采取整群抽样方法，对滁州市4所高中三年级毕业班学生518名进行问卷调查。结果81。5%的学生使用过互联网。
Methods By using the cluster sampling method, a sample of 518 students drawn from 4 high schools in Chuzhou, then a questionnaire survey was conducted among them.
方法采取整群抽样方法，对滁州市4所高中三年级毕业班学生518名进行问卷调查。结果81。5%的学生使用过互联网。
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