On the basis of previous studies, this paper introduces the definition of constructivism and relevant theory and its teaching mode. It is concluded that constructivism can improve the level of oral English teaching by experiment contrast. Thus it proves that constructivism can be used in junior middle school oral English teaching. Therefore, the paper approaches the current oral English teaching from the perspective of constructivism. 

2. Literature Review

2.1 Relevant studies abroad

Constructivism was first put forward by Piaget (1996) who was a Swiss psychologist in 1960s. In the 1990s, a number of papers promoted the spread of constructivism as a scientifically educational theory or even a learning theory. Von Glasersfeld E. Who was the famous radical constructivist in America published some papers (1996:3-7; 1993:23-28), which deal with radical constructivism. There were quite a few academic works focus on constructivism: A Way of Knowing and Learning by Von Glasersfeld, E. (1995); The Practice of Constructivism in Science Education edited by K.Tobin (1993); Constructivism in Education by Leslie P. Steffe&Jerry Gale (1995); Constructivism and New Zealand Science Education by Matthhews.M (1995). Constructivism has become the leading theory of the educational reform. The United States of America takes constructivism as its guiding principle in National Science Education Standards in 1996. In Germany, Dr.R.Puit from Gell University has advocated reforming education under the guidance of constructivist theory. In Britain, constructivism has always been paid much attention to by the Science Education Research Centre(科学教育研究中心）of Leeds University. 

2.2 Relevant studies in China

Zhang Jianwei&Chen Qi (1998) explored the constructivist theory in teaching and suggested many solutions. In their paper, they regarded constructivism as a further development of Piaget’ thoughts which emphasize learning as a process of meaning construction, and they also advanced some models such as Scaffolding, Anchored and Random Access and learning strategies--learning collaboratively and learning automatically. Li Kedong(1998) discussed the theoretical basis and technical requirements of multi-media teaching software development. In 1998 and 1999, college English teaching saw the first climax in exploration of combining constructivism with English teaching. Afterwards, many scholars investigated the topic in their paper. Accordingly, constructivism is widely accepted in the contemporary educational field, and it has become one of the leading theories in educational reform in the 21st century (Peng Hongwei&Jiang Jingchuan 2004).