http://www.successcds.net/Career/qna/cbse-open-book-exam-system-from-2013-2014-session-11674.html . CBSE Open Book Exam System (Classes 9th, 10th, 11th and 12th).
Also See http://youtu.be/TYo8b4SgRw0 - Class XII Board Exams - Study tips you should not miss
The board will soon inform the schools regarding the open book system and a notification will be issued within a week. While all subjects in senior school are included for the open book exam scheme which includes mathematics, social science, science and languages, for the senior secondary classes we have restricted it to just four subjects as of now.
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CBSE Open Book Exam System Voice Over by Sushmita Dasgupta.
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Complete text of the video is here http://goo.gl/uRW1y
