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1
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Time-on-task and pupil achievement in science effects of instructional leadership
প্রকাশিত 2002গবেষণাপত্র -
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Mastery motivation in early childhood development, measurement, and social processes
প্রকাশিত 1993গ্রন্থ -
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Operational teacher training objectives and raising achievement levels a monograph.
প্রকাশিত 1986গ্রন্থ -
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