Integrated Science A was set to a new science course of study revised 1998. A teaching module of the "Integrated Science A" was developed and trialed in an attempt to facilitate students' acquisition of the science knowlege related to the environmental issues. It is proposed that STS approach should be implemented in "Integrated Science A" lessons dealing with "Use of Natural Resources and Natural Environment". Through such lessons,the students were deepened their understanding not only on use of energy and development of natural resources but also on protecting of natural environment. In addition,they are encouraged to deepen their STS skills through participation in such class,and eventually to make appropriate decisions to care for the environment.