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

(1)环境辐射教材的编写我们开发了一种方法，通过这种方法，他们可以在初中和高中简单地观察克鲁克斯管发出的x射线。我们使用了牙科x光片。我们发现他们能够用天然铀对贝克勒尔发现的放射性进行再实验。我们开发了一种简单的云室，它可以抵抗酒精，只需要一点点干冰就可以了。利用美国LND公司的GM管和计步器，研制了简便易行的辐射计数器。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。我们使用的是实验室里不再使用的核乳剂。其中一位作者对当地的辐射水平进行了实地调查。他曾在宁友沟地区、琵琶湖北部地区和关东地区工作。我们猜测了局部地区与其地质特征之间的有意义的关系。(2)对我们周围所熟悉的辐射物质的调查我们调查了营地中使用的灯的气体罩的辐射能。我们发现气体地幔中含有钍- 232。我们找到了他们简单地得到放射性氡的方法，并观察了在一定的时间内，放射性氡从气体包覆层（如薄膜箱）中衰变的过程。(3)环境辐射教学实践指导与高中、初中、小学4名教师合作。他们把环境辐射的教学付诸实践。我们发现了对学生的显著教学效果。

(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.