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In order to get the most out of the film the following questions might be used as guidelines for this is the substance of the film: 1) What are the many uses of water? 2) Why is the amount of water which is being used constantly increasing? 3) Why is there a world water shortage? 4) Why do floods occur (with a con- comitant loss of water)? 5) What can be done to prevent water waste? 6) How can world cooperation help to regulate the earth's water supply? THE WEB OF LIFE SERIES Color—Sound Encyclopaedia Britannica Films 2 parts; Rental—Sale 30 minutes complete Today evolution is considered an on-going process rather than a static accomplished set of activities. This film, in reel one, empha- sizes this point as it shows that unless living things can adapt them- selves to constant change, they must perish. This adaptation results in the many forms of life which exist and are constantly developing. The balance of life within which an organism exists is shown to be very delicate and it is understood to be applicable to all forms of living things, although plant life is used for emphasis in this film. Reel two brings to our attention the extent of damage which can result from man's interference with the balance of nature. Some of the problems, with some ideas of solving them, are introduced, such as poor forest utilization, overgrazing, indiscriminate slaughter of predators. The film also makes us aware of possible problems resulting from our population explosion. WHAT IS ECOLOGY? Color—Sound Encyclopaedia Britannica Films 11 minutes Rental—Sale Since ecology, if understood, leads to an appreciation of conser- vation, this is an important and fundamental film. In advance, chil- dren should understand all the terms which are used, such as scavengers, decomposers, community, aggregation, biome, etc. With this knowledge they can be directed to look for how a lack of knowledge caused the catastrophes depicted—loss of a farm, floods, dust storms, etc. They can then understand how a knowledge of ecology could have prevented the tragedies. They may even be able to supply the exact knowledge in some of the cases. Certain concepts such as change, community interaction, the sun as the prime source of energy are particularly well explained. 54