11.   Buildings were locked, blinds were drawn, and students were kept away from windows.

12.   But he spends increasing effort trying to preserve Vietnamese culture as a way to keep students out of trouble.

13.   But she said the numbers mask how successful in-school suspension has been at keeping unruly students on track academically and off the street.

14.   But universities are finding creative ways to keep students in school.

15.   Critics of bilingual programs say that they do not keep students from falling behind in math or social studies, but rather hinder their mastery of English.

16.   Detractors compare the school to a cult, saying that it relies on a charismatic leader, confrontational encounter groups and peer pressure to keep students in line.

17.   He also had allegedly kept the student from leaving the room, prompting a felony false imprisonment charge.

18.   He said the measure would be prohibitively expensive and could keep some students from earning a diploma.

19.   Helmeted police with batons, bamboo sticks, and rifles kept students from leaving the gates and spilling into the streets.

20.   He works with teachers to keep students on track to graduate.