“先学后教 ,先练后讲”的教学步骤是 :第一步 :即前学或前练 ,让学生各自按老师预先设计的题目 ,动脑、动手、动口 ,进行尝试性的学习 ,有时默读或轻声朗读 ,有时翻查工具书 ,有时潜心思考 ,有时圈点批注 ,形式多样。在前练过程中 ,教师要把握学习方向 ,提示必要的知识和方法 The first step: that is, pre-school or pre-practice, so that students each according to the teacher predesigned topics, brains, hands, mouth, tentative learning, Sometimes reading silently or softly, and sometimes looking up reference books, and sometimes devote themselves to thinking, sometimes punctuated, diverse forms. In the pre-practice process, teachers should grasp the learning direction, suggesting the necessary knowledge and methods