As one parts of the national curriculum, the j umor nigh scnool science class experienced ups, and downs during its regional implementation process. The reasons could be the external or internal ones, teaching factors, and the compilation of the teaching materials etc. Thus the researchers should make sure that it is necessary to have sound demonstrations before the implementation of the junior high school science class. The set-up of junior high school science class should be supported by the proper supporting mechanism and have reasonable kno...
