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【Abstract】Based on constructivism and ZPD， the present study went through experimental teaching in two parallel classes for a semester in Hunan International Business College： One class was chosen as the experimental class for the scaffolding introduction implementation， and the other as the control class following PPP approach. A study will be carried out comparing the conventional presentation， practice and production （PPP） OBET approach with the scaffolding instruction.
【Key words】oral business English ； scaffolding instruction ； communicative competence ； higher vocational college
【中圖分类号】G64 【文献标识码】B 【文章编号】2095-3089（2015）2-0029-01
1. Research Hypotheses
The study aims to confirm the hypotheses that the scaffoldingbased teaching approach is better than the PPP teaching method to improve students’ oral business English.
2. Subjects
The experiment involved 60 students from two intact classes in Hunan International Business Vocational College. Both the experimental class and the control class have 30 students respectively， and all of them are freshman and native speakers of Chinese who majored in Business English. They have been divided into two classes after they entered this college， following with the normal administrative procedures at the college， in a manner that might be expected to result in very similar ability. The two classes have no obvious difference in terms of English proficiency and application ability. In addition， the researcher simultaneously taught these two classes which could make sure that the experiment results would not be influenced by the other factors such as the students’ and teachers’ former abilities and so on. Class 1 who received the scaffolding instruction was assigned as the experimental group and the class 2 was arranged in a control group who were taught with the PPP teaching approach.
3. Research Instruments
The research instruments connected with this study are involved in as following： pretest and posttest， videorecording， students’ logs and Statistical Program for Social Sciences （SPSS （19.0）） software.
At first， two oral business English tests are going. Business English Certificates （BEC） Preliminary & Secondary Oral English Level Exam is one of the most popular tests testing business English level which have high validity. And the researcher adopted the form of exam to test students’requency， complexity and accuracy in oral business English. Of course， the examination score is a significant measure index to the students. All the participants from class 1 and class 2 have to actively take part in the pretest and posttest activities.
【Key words】oral business English ； scaffolding instruction ； communicative competence ； higher vocational college
【中圖分类号】G64 【文献标识码】B 【文章编号】2095-3089（2015）2-0029-01
1. Research Hypotheses
The study aims to confirm the hypotheses that the scaffoldingbased teaching approach is better than the PPP teaching method to improve students’ oral business English.
2. Subjects
The experiment involved 60 students from two intact classes in Hunan International Business Vocational College. Both the experimental class and the control class have 30 students respectively， and all of them are freshman and native speakers of Chinese who majored in Business English. They have been divided into two classes after they entered this college， following with the normal administrative procedures at the college， in a manner that might be expected to result in very similar ability. The two classes have no obvious difference in terms of English proficiency and application ability. In addition， the researcher simultaneously taught these two classes which could make sure that the experiment results would not be influenced by the other factors such as the students’ and teachers’ former abilities and so on. Class 1 who received the scaffolding instruction was assigned as the experimental group and the class 2 was arranged in a control group who were taught with the PPP teaching approach.
3. Research Instruments
The research instruments connected with this study are involved in as following： pretest and posttest， videorecording， students’ logs and Statistical Program for Social Sciences （SPSS （19.0）） software.
At first， two oral business English tests are going. Business English Certificates （BEC） Preliminary & Secondary Oral English Level Exam is one of the most popular tests testing business English level which have high validity. And the researcher adopted the form of exam to test students’requency， complexity and accuracy in oral business English. Of course， the examination score is a significant measure index to the students. All the participants from class 1 and class 2 have to actively take part in the pretest and posttest activities.