| 摘要 |
PROBLEM TO BE SOLVED: To provide a learning material in which a learning sheet is superposed onto a material sheet and, in a problem display of the material sheet, question elements are readably visible and answer elements are illegibly shielded. SOLUTION: A set unit material is formed and has one set which consists of a material sheet which is composed of a thin paper sheet material whose surface has a problem display including question elements and answer elements and a learning sheet which is composed of a thin paper sheet material which is superposed onto the material sheet so as to be rolled up, and a booklet is constituted in which a plurality of sets of the set unit materials are stacked. A learning sheet is formed of a window part which makes the question elements be seen and a masking part which covers the answer elements so that they are hardly seen and a shielding film is formed by an opaque printing agent which is printed in a laminated shape to the masking part. COPYRIGHT: (C)2009,JPO&INPIT
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