An instructional toy, comprising: a doll having an outside portion and an inside portion, the inside portion removably containing at least one body part; a book having a related shape of the at least one body part being substantially the same size and shape as the at least one body part and indicia on at least one page of the book related to the at least one body part.

 
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< PORTABLE TERMINAL DEVICE HAVING FUNCTION OF MEASURING MENTAL FATIGUE AND ITS MEASURING METHOD

> Method and System for Knowledge Diagnosis and Tutoring

> INTEGRATED LEARNING MANAGEMENT SYSTEM AND METHODS

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