1.   Now, the teacher marks her grade book, then marks one or more Scantron sheets for each class.

2.   Teachers, ever-protective of the sanctity of their grade books, say the board has robbed their independence and professionalism.

3.   The lights stay lit until the teacher, who retains access to the electronics box and the grade book, resets them.

4.   She told the newspaper that the loss of the grade books jeopardized the academic future of hundreds of students.

5.   Such applications are natural extensions of computerized grade books, which have been common for a decade.