综合实践活动是一门综合性强、开放性大的课程,由于教师在课程的开展实施过程中缺乏现成经验,一直处于摸索前行中。研究性学习作为综合实践活动中重要的内容,强调以学生为主体,重视学生的主动参与,并在参与过程中主动建构知识体系,用以培养学生创新精神和实践能力。而项目式学习就是以项目为载体、以教师为引导、学生为主体的儿童为中心的教学方法。在基于项目活动的研究性学习中,教师指导作用的发挥至关重要。本文对教师在基于项目的研究性学习中指导作用的发挥作初步探讨。 Comprehensive practice activities is a comprehensive, open large courses, as teachers in the implementation of the course of the lack of ready-made experience, has been in the process of exploration. As an important content in comprehensive practice, research-based learning emphasizes student-centered, students ’initiative participation, and proactively constructs a knowledge system in the process of participation to cultivate students’ innovative spirit and practical ability. Project-based learning is based on the project as a carrier, teacher-led, student-centered children as the center of teaching methods. In research activities based on project activities, the instructor’s role is crucial. This article gives a tentative discussion of how teachers can play a guiding role in project-based research learning.