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Emphasizes the importance of proper cleaning in the care of teeth, and illustrates how the teeth are affected by excessive use of refined sugar. Identifies the kinds of bacteria that change sugar to acid in the mouth. Demonstrates the use of sodium fluoride solution in the prevention of tooth decay and prescribes specific rules to be followed in the care of the teeth.
Presents Ruth, Jump, Marjorie Gestring, and others diving from a 33-foot tower to show championship form in diving. Pictures Iris Cummings and the Hopkins twins as they demonstrate the breast stroke and crawl.
Slow-motion and underwater photography are used in demonstrating how swimming students emulate the motins of the dolphin as they learn the dolphin kick, the accompanying body undulations and the butterfly arm action which combine to increase the power of the breast stroke. Educational author, Francis Dixon.
Compares the nervous systems of the hydra and earthworm with the complexity of the human nervous system. Details the physiology of the reflex arc and explains the activities of certain brain centers. Pictures laboratory experiments in which the encephalograph is used and explains its functions. Shows application of knowledge to actual techniques in brain surgery.
Shows the community of Lantzville, British Columbia, a cross-section of nationalities and industrial groups, with a drab and neglected school. The interest of a school inspector inspires a complete transformation of the physical plant and the teaching. The pupils enter into the plans enthusiastically and accomplish a great deal; as a result they have increased interest and pride in their school.
Shows how Sally can, in an emergency, prepare a hot meal quickly, using her mother's ready supply of canned and frozen foods. The narrator emphasizes the correct use of the proper utensils, the time-saving advantage of a modern gas range, and the importance of intelligent marketing.
Explains the effects of lenses on light, and shows the construction and use of a lens. Pictures the types of images formed by convex and concave lenses when an object is placed at varying distances from the lens. Shows the use of lenses in cameras, microscopes, and telescopes.
National Commission on Safety Education, National Education Association
Summary:
Economical driving practices are suggested by a service station operator to a boy who has just received permission to drive the family car alone. Includes care of the car's finish, warming up of the engine, proper use of clutch, efficient braking practices, and the effect of acceleration and speed on tire wear and gasoline consumption.
Students demonstrate the procedures that may be applied to fashion a space design. Details the making of an initial sketch, a three-dimensional model, and a final structure. Shows steps in the creation of space design usng metal, plastic, and other materials. Consultant, George Barford.
A second-grader's experiences during a day without numbers cause him to want to study arithmetic and to realize the value of numbers in his everyday living. All the class but Bob enjoy arithmetic. When a puppet with magic powers offers Bob a day without numbers, he gladly leaves the classroom with the puppet. A series of frustrating experiences caused by the magical disappearance of numbers, such as the disruption of an exciting baseball game, results in Bob's gladly returning to the classroom and the study of arithmetic.
Dr. Ray Koppelman, University of Chicago, American Institute of Biological Sciences
Summary:
Diversity of life resulting from evolution: recognition and treatment of diversity –definitions and taxonomic approaches; results of diversity in the plant kingdom; results of diversity in the animal kingdom, with particular emphasis on the evolution of man; diversity in time –divergence, convergence, extinction, the fossil record diversity in space –ecological relations in a habitat.
Uses drawings and dissected specimens to compare the nervous systems in hydra, planaria, earthworms, and grasshoppers and shows the response of a paramecium, euglena, amoeba, hydra, and planaria to stimuli. Points out the spinal cord, spinal nerves, and parts of the brain in a freshly dissected pig and makes comparisons between the parts of the brain in frogs, birds, cats, and humans. Illustrates through still and animated drawings the basic elements of the neuron and the pathway of the nerve impulse during a reflex arc.
Demonstrates how the facilities of a large city library are made available to rural libraries. Shows the library truck from Gary, Indiana, delivering books, pictures, and other materials weekly, free of charge, upon the written request of a small-town librarian. Indicates how such cooperation results in better public service.
