| 摘要 |
1,119,472. Educational appliances. A. F. DAVENPORT. 21 Sept., 1966 [21 Feb., 1966], No. 42163/66. Heading G5G. A teaching device comprises two sheets 4, 12 interconnected along one or two edges, e.g. by stapling, adhesive or being integral with each other, each having on their upper surfaces sets of positions each numbered for correspondence with a presented multi-choice question, each position having indicia for correspondence with a possible answer, and the upper sheet having on its under surface visually indistinguishable reproducing and non-reproducing areas in register with those positions corresponding respectively to correct and incorrect answer choices. The reproducing areas are processed with a pressure sensitive colour ink. The non- reproducing areas may be processed with a non-reproducing ink or left blank. Each set may include two further positions Y, N corresponding to a " yes-no " question presented together with the multi-choice question for that set. The sheets can be formed of paper which permanently records marks made thereon. A third sheet (24) (Fig.2, not shown) connected to or separate from the other sheets may be provided with one face having a colour similar to the reproducing means such that with the third sheet positioned between the first and second sheet the device can be subjected to greater pressure when being folded. |
