Ⅰ. Introduction Ⅱ. Literature Review 2.1 The definition of controlled writing in L2 language learning 2.2 Previous studies on controlled writing and grammar acquisition Ⅲ. Methods 3.1 Participants 3.2 Instruments 3.3 Procedures 3.4 Data analyses Ⅳ. Results and Discussion 4.1 Results for the posttests in grammar acquisition 4.2 Results for the delayed test in grammar acquisition Ⅴ. Conclusions Works Cited