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

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發送短信 : Effects of Prior Knowledge in Mathematics on Learner-Interface Interactions in a Learning-by-Teaching Intelligent Tutoring System