“以学定教”是指以学生的发展为根本出发点,即为了学生身心、个性等的全面发展,这也是新课改的目标所在。本文从“以学定教”理念出发,探究高中英语开放性课堂的营建,对课前准备、上课方式、教学互动评价等进行探究,课前准备让高中英语课堂充满未知期待;开放性的课堂教学方式,让高中英语课堂放飞学生思绪;开放性的高中英语教学评价,让学生充满自信。 “To learn to teach ” refers to the student’s development as a fundamental starting point, that is, for the overall development of students physical and mental, personality, which is the goal of the new curriculum reform. Based on the concept of “learning to teach”, this article explores the construction of high school English open class, explores pre-class preparation, class style and interactive teaching evaluation, and prepares senior high school English class for full and unknown expectation before class; Classroom teaching, so that senior high school English classroom students thoughts; open high school English teaching evaluation, so that students full of confidence.