1. An instructional apparatus comprising the combination of: a booklet containing a plurality of pages or sheets; a first page of said pages displaying a set of pictorial images arranged in a predetermined order, a worded question area carrying corresponding question indicia and a set of symbols indicative of a variety of selectable answers associated with said images; a second page of said pages having a clue area carrying indicia related to said set of pictorial images and an answer area carrying a plurality of said symbols wherein a first set of said symbols representing correct responses are located in a predetermined manner and the remaining of said plurality of symbols are randomly crowded aout said first set thereby obscuring said first set; a decoding device having a plurality of open windows for displaying only said first set of said symbols carried on said answer area when said decoder is located in a predetermined location on said answer area; and said decoder further having movable means carrying said set of symbols for seleceted display via openings adjacent to each of said open windows whereby symbols on said movable means can be comparied with symbols present at said windows.
1. An instructional apparatus comprising the combination of: a booklet containing a plurality of pages or sheets; a first page of said pages displaying a set of pictorial images arranged in a predetermined order, a worded question area carrying corresponding question indicia and a set of symbols indicative of a variety of selectable answers associated with said images; a second page of said pages having a clue area carrying indicia related to said set of pictorial images and an answer area carrying a plurality of said symbols wherein a first set of said symbols representing correct responses are located in a predetermined manner and the remaining of said plurality of symbols are randomly crowded aout said first set thereby obscuring said first set; a decoding device having a plurality of open windows for displaying only said first set of said symbols carried on said answer area when said decoder is located in a predetermined location on said answer area; and said decoder further having movable means carrying said set of symbols for seleceted display via openings adjacent to each of said open windows whereby symbols on said movable means can be comparied with symbols present at said windows. 2. The invention as defined in claim 1 including: index means carried on said answer area and on said decoder for registering said decoder on said answer area at said predetermined location.