The Educational screen (c1922-c1956])

Page 264 The Educational Screen S. V. E. Tri-Purpose Model AA. 300 Watts Head swivelled for showing double frame horizontal filnr>slide. THE VERSATILE ^M Tri Purpose PROJECTOR Shows PICTUROLS Educational filmslides, produced by the Society for Visual Educa- tion. Each roll has series oi 30 or more pictures. OTHER FILMSLIDES Strips of 35 mm. film either single or double frame (horizontal or vertical) made by teachers ot members of the student body us- ing ordinary miniature cameras. Also educational film slides pro- duced by other companies and listed in the S.V.E. catalog. Double Frame Verticol Film MOUNTED FILM Individual frames of black and white or color film, mounted in 2" X 2" glass slides or in Koda- slide Ready Mounts. Double Frame Horizontal Film of the The advanced optical system S.V.E. Tri-Purpose Projector assures brilliant life-size images from any oi the above types of film. A patented heat-absorbing filter and a releasing mechanism for the rear aperture glass fully protect the film emulsion. Two styles—Model CC, with 100 watt lamp, lens, slide carrier, and case, $35.00— Model AA, with 300 watt lamp, lens, slide carrier, S.V.E. Rewind Take-up and case, S57.S0. Mail Coupon For Literature! SOCIETY FOR VISUAL EDUCATION, INC. -.«/ g- Depl. 9ES, 100 E. Ohio St.. Chicago, III. Send literature on S.V.E. Picturols and S.V.E. Proiectors, including the versatile Tri-Purpose models. NAME SCHOOL CITY STATE New Fall Catalog NOW READY! IIVTERIVATIOIVAL FILlU BUREAU 59 E. Van Buren St., Chicago, III. Teach with Comparison (Continued from page 262) count the number of step.s taken, then calculating the length of the stride. Pupils can find many uses for this unit of measurement. Other comparative stan- dards, such as, "As high as I can reach" ; "Just as tall as I am"; "It weighs just as much as I do"; "As wide as my hand"; and others, can readily be developed. Smell, taste, and sounds are also based upon bodily reactions for their comparisons and identifications. .\nother idea is to trace out, understand, and use standards contained in some common expressions. For example: "A pint is a poimd the world around". Is this a true statement? It is always true? Under what conditions is it true? A simple laboratory exercise will furnish the exjaerimental evidence, and will also assist in answering such questions as: How much does a gallon of water weigh ? A gallon of milk ? A gallon of gasoline? .'\ second illustration. "From the tip of his Royal finger to the tip of his Royal nose is one yard. The story is told of the little girl, who had often seen her mother measuring cloth in this manner, say; "Mamma, smell this string for me and see how long it is." Many people use this convenient method of measuring cloth, rope, twine, etc., by the "arm's length plan"—from finger tip to the tip of the nose. After a few experimen- tal trials one can become ver}' skilled in measuring things by the yard in this manner. Pictures are used mainly to convey correct images of persotis, places, things, or relationships in order that these new concepts may form the basis for judging and comparing in new situations. Teachers cannot be too careful, therefore, to select pictures that convey whole truths, and not half-truths. A familiar illustra- tion is that of the child who declared that a hijipopota- mus was no larger than a rabbit. The child, on being questioned as to why he had come to that conclusion, produced an illustrated book showing a rabbit on one ])age, and on the opposite page the picture of a hip- I)opotatnus. Both pictures were absolutely the same size and both animals stood out in bold relief without a single object in either .picture to afford a basis for com- parison that might convey the real truth regarding the relative sizes of these two vastly different animals. Obviously, there should be in the pictured scene some familiar unit of measurement by means of which in- telligent comparisons may be made of size, form, dis- tance, etc. Teachers who study the techniciues used in educational motion pictures, for instance, will ob- serve that people are often included in certain types of scenes as the standard for comparison. Likewise, rulers are often pictured in motion picture scenes. In the case of some small objects they are photographed while being held in a person's hand. The map has customarily been used to represent the shape, length, breadth, and area of countries. In the geography books each country or continent often