The PROJECTION
of QUIZ QUESTIONS
FREDERIC B. DUTTON Baldwin-Wallace College, Berea, Ohio
T
HE use of Cellophane for the making of lantern slides has been described by Wilson1and the use of Cellophane roll film by Davies and other^.^ In order to reduce to a minimum the work and cost of administering and grading quizzes the questions have been typed on Cellophane and projected. The author uses chiefly true-false and multiple-choice questions although, as has been pointed out, anything that may be typed, written, or drawn may be projected in this manner. The students record their answers on uniform slips of paper which are easily graded by means of a check slip or stencil. A carrier somewhat different in design from the one previously describedz is used to facilitate the rapid removal and filing of material for future use. The construction of the carrier as described below is readily effected with tools usually found in the small laboratory. ,:-The frame, A, Figure 1, is made either of wood or sheet metal. The removable spindles, B, are 33/4inch film spools* with the metal ends removed. These may
QUESTIONS PROJECTED BY A ~ ~ O R T - F ~LANTERN C U S UPON DAYLIGHT SCREEN
A
hacksaw slots in the ends of the two bolts carrying the wing nuts. The device is inserted in the projector in place of the usual slide carrier. The material thus projected may be changed a t will by turning the receiving spindle. No wide rollers are necessary with short strips of Cellohe projection phane. of quiz questions in this manner is especially &ective when used with a
be procured from any photo finisher as they are usually discarded. The spindles are sprung into place by pulling the wing nut, D, away from the frame. A piece of clock spring, E, keeps the spindles in place and the Cellophane, C, under proper tension. The cut-away section shows the construction of the wing-nut assembly. A thin strip of metal, F, serves as a washer and seat for the spring to work against. The spindle supports are 3/le-inch stove bolts. Small pieces of sheet metal serve as the keys, G, and are soldered into
INSERTINGTHE LOADED SPINDLE
short-focus lantern and a THELOADED FILMHOLDER daylight screen. The cost of the materials for twenty-five questions does not exceed two cents. This is but a small fraction of the cost of a mimeograph stencil alone. Much less paper and time are consumed than with a printed test. The questions may be administered as rapidly or as slowly as desired and the time allowed for any one question controlled. The quizzes are easily filed away for future use and imme1 WILSON, "Lantm slides from Cellophane," J. CHEM. E ~ u c .8,, 2212 (Nov., 1931). diately available. The device, aids the instructor in a BONAR,BONAR,AND DAVIES,"Cellophane roll 6lms for giving numerous short quizzes, thus disconraging the slide lanterns." ihid., 10, 92 (Feb.. 1933). fine art of procrastination. * 3A Kodak 6lm spools are suxtable.
