This book gives valuable information regarding research in the field of audio-video assisted packages for Teaching-Learning Environmental Science at Schools. The opening chapter looks into present school scenario in general and the use of educational technology in particular. The subsequent chapter looks into various audio, video, audio-video and other innovative studies. The chapter on design contains the information pertaining to tools, techniques used for research. In the succeeding chapter the author has shown proof for the effect of this intervention with help of quantitative data. Then, the next chapter has listed findings of the study. In the concluding chapter the entire study is summarised.