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School children use responder device in class

Updated: 2014-11-19 07:59 (CRIENGLISH.com)
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School children use responder device in class

The screen of the intelligent responder device shows the answer of each student for a choice question in a mathematic class on Nov 17, 2014. [Photo/IC]

School children use responder device in class School children use responder device in class School children use responder device in class
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