發送短信 : Effectiveness of jigsaw, think-pair-share and numbered heads together on students' oral participation in speaking lessons

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 / ____||  \ \\/ //  /_____//  |  ___||  |__  //  
/ //---`'   \ ` //   `____ `   | ||__      / //   
\ \\___      | ||    /___//    | ||__     / //__  
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  `----`     `-`'    /_//      `-----`   `-----`  
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