Educational-teaching device

An educational device with which a user can learn and employ useful information in stepwise and correct collation of such information to decipher an unintelligible source of such intelligence, said device comprising

• a generally flat base member, said base member having intelligence conveying indicia thereon arranged in a normally unintelligible array thereof, said base member further having a pattern of locator indicia thereon, and additionally carrying a printed listing thereon of useful information in the form of questions and plural answers to each question only one answer of which is correct,
• a first mask positionable over the base member unintelligible indicia array, said first mask having two opposed faces, each of said two faces carrying indicia markers thereon, that on one face being distinctive from that on the other face, said first mask further having windows therein and a locator opening, the locator indicia pattern on said base member being associated with positioning of the mask locator opening in register over a select one of the indicia in said pattern, the windows in said mask uncovering a portion only of said card unintelligible indicia array when the mask locator opening is registered with said select one indicium, said mask having a placement indicia formation on each of its opposed faces the correct answers to certain of the useful information questions on said base member being denotive of the face of said first mask which must be upright when said first mask is positioned over said array and the said one indicium with which said first mask locator opening is to be registered, and
• at least one additional mask positionable over the first mask, said additional mask having two opposed faces, each of said two faces carrying indicia markers thereon, that on one face being distinctive from that on the other face, said additional mask further having windows therein and a locator opening, the placement indicia formation on said first mask being associated with positioning of the additional mask locator opening in register over a certain one of the indicia in said formation and when the additional mask locator opening is registered over such certain one indicium, the windows of said additional mask uncovering only so much of the unintelligible intelligence array framed by the first mask windows as presents an intelligible message, the correct answers to others of the useful information questions on said base member being denotive of the face of said additional mask which must be upright when positioned over said first mask and the said certain one indicium on the first mask with which said additional mask locator opening is to be registered.