新课程标准明确提出学生是课堂的主体,是探究学习的主要角色,教师是课堂教学的组织者、引导者和帮助者。观察蚯蚓这一章节从学生的生活经验出发,向学生提供充分的科学活动和交流机会,让学生亲自动手捉蚯蚓、画蚯蚓、设计实验,给蚯蚓设计一个家,使他们通过观察、提问、设想、动 The new curriculum standards clearly state that students are the main body of the classroom and the main role of inquiry learning. Teachers are the organizers, guides and helpers of classroom teaching. Observing the chapter, starting from the student’s life experience, students are provided with sufficient scientific activities and opportunities for communication, so that students can personally draw, paint, design experiments, and design a home for them to observe and ask questions. Ideas, actions