| 11. | Murray had only one word on the blackboard Wednesday : Composure.
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| 12. | Remember those blackboards that Tony and I found under the tree?
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| 13. | Its practitioners fill blackboards with equations and clog computers with data.
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| 14. | The answers can't be found through a blackboard exercise.
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| 15. | Online commerce looks something like the blackboard model of perfect competition.
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| 16. | A classroom had a blackboard with drawings of American fighter jets.
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| 17. | Students wrote farewell notes to the missing classmates on the blackboard.
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| 18. | Each classroom has a photograph of Saddam Hussein above the blackboard.
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| 19. | The school has three cinderblock classrooms with video equipment and blackboards.
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| 20. | The educational tools were limited to small blackboards and paperback textbooks.
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