RESEARCH FOR TEACHING MATERIALS AND GUIDANCE OF ENVIRONMENTAL RADIATION--FOR THE CREATION OF THE PERIODS OF INTEGRATED STUDY AND THE NEW SCIENCE EDUCATION---

（1）环境辐射教材的开发。我们开发了他们在初中和高中简单地观察克鲁克斯管发出的X射线的方法。我们用了牙科X光片。我们发现他们能够用天然的铀元素重新实验贝克勒尔发现的放射性。我们开发了一个简单的云室，它可以防止酒精，只需少量干冰即可工作。我们利用美国LND公司的计步器和GM管，研制了一种简便的辐射计数器。我们开发了一种简单的方法，通过这种方法，他们可以直观地观察和分析钍的α衰变。我们使用了实验室中不再使用的核乳胶。作者之一（H.O.）进行实地工作，调查当地的辐射水平。他曾在宁优头格地区、琵琶湖北部地区和关东地区工作。我们推测了当地与其地质特征之间的有意义的关系。（2）对我们身边常见的辐射材料的研究我们对野营灯的气体罩的辐射能量进行了研究。我们发现气体地幔中含有钍232。我们找到了他们在一定时间内简单地获得和观察放射性氡从气体地幔中衰变的方法，如在薄膜情况下。（3）环境辐射教学的实践指导我们与4名高中、初中和小学教师合作。他们把环境辐射的教学付诸实践。结果表明，该教学模式对学生的学习效果显著。

(1)Development of the teaching materials on environmental radiationA. We developed the method by which they simply observed the X-ray emitted from the Crookes tube in junior and senior high schools. We used the dental X-ray films. And we found out that they were able to re-experiment on the Becquerel's discovery of radioactivity with the natural uraniumore.B. We developed the simple cloud chamber that is proof against alcohole and work just with a little of dry ice.C. We developed the handy and simple radiation counter with the pedometer and the GM tube made by LND Corp. in USA.D. We developed the simple method by which they observed visually and analyzed α decays of the thorium. We used the nuclear emulsions no longer in use possessed in the laboratories.E. One of the authors(H.O.) did the field work on the investigation of the local radiation level. He worked in Ningyou-touge area, the north area of Biwako lake and the Kanto region. We guessed the meaningful relations between the local areas and their geological features.(2)Investigalion of the radiation materials familiar around usWe investigated the radiation energies from the gas mantle of the lamp useful in camp. We found out that the gas mantle contained the thorium232. We found out the way by which they simply got and observed the decays of the radioactive radon from the gas mantle packed such as in the film case within a certain period of time.(3)Guidance for the practice of the Environmental Radiation's teachingWe collaborated with 4 teachers of the senior and junior high school, and elementary school. They put the environmental radiation's teaching into practice. We found out the significant teaching effects to the students.