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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.
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.
Shows a group of children playing three types of games: those which they invent themselves, those learned under supervision but carried on alone, and those dramatic activities which grow out of school activities.
Surveys the problem of human survival in space. Pictures the firing of an Aerobee containing two monkeys and two mice. Shows the reaction of mice to the reduction of gravity pull as the missile leaves the surface of the Earth. Points out that tests show no reason why man cannot fly 37 miles into the atmosphere. (New Mexico College of A.& M.A.) Film.