71.   On Wednesday, after the street protest, heavy security had been in place to keep students from going into the streets.

72.   On Wednesday, the students were kept in the schoolyard with teachers maintaining order while police outside the gate formed a barricade against the white protesters.

73.   Peoria School District spokeswoman Kelly Bell said students were being kept in the rooms where they are and the doors are locked.

74.   Riot police, standing six deep and linking arms, kept the students from storming the diplomatic mission.

75.   School districts across the nation are simply keeping students at their desks, and that worries some parents and child development experts.

76.   Schools kept students home, and skyscrapers cut off access.

77.   Some are taking steps to keep students in line.

78.   The plan called for people to block exits to keep students from escaping, according to police.

79.   The university keeps the students on a short leash.

80.   To keep students on their toes, Midinod has devised its own set of examinations which are based on its internal syllabus.