Improvements in or relating to didactic devices or appliances more particularly for children

摘要

1,062,012. Books. PHILOGRAPH PUBLICATIONS Ltd. May 24, 1965 [May 27, 1964], No. 21912/64. Heading B6A. [Also in Division G5] A book-like device suitable for teaching children arithmetic comprises cover members 10, 11 and leaf members 13 . . . 17 of paper, cardboard, or plastics material, all bound together by a plastic or wire binder 12, each leaf member comprising several independent sheets, side-by-side, and independently pivotal about the binder 12. As shown, the member 13 comprises six sheets each marked with the fraction SP1/SP/ 6 , the member 14 comprises three sheets each marked SP1/SP/ 3 , and the cover 11 is marked to provide twelve equal parts and each is marked SP1/SP/ 12 . The members 15, 16, 17 are unmarked and comprise sheets large enough to mask the sheets beneath them. In modifications, the sheets are marked with other fractions, or decimals, or words, or pictures.