“过河式”模型(图1)是在一线教学实践中为有效设计和达成三维目标而提出的一个简单、直观、形象的教学学习活动模式,比“三角式”模式(图2)具有更多的优点,能让教师结合课堂教学的具体内容,来有效分析、设计和达成三维目标,更有效地促进一线教师在新课程理念下对课堂教学的反思、实践和研究,实现数学课堂教学的“由 The ”cross river type“ model (Figure 1) is a simple, intuitive, and vivid teaching and learning activity model for effective design and achievement of three-dimensional goals in first-line teaching practice. The ratio of ”triangle" model (Figure 2) It has more advantages, allowing teachers to effectively analyze, design and achieve three-dimensional goals in conjunction with the specific content of classroom teaching, and more effectively promote the reflection, practice and research of frontline teachers on classroom teaching under the new curriculum concept. Mathematics Teaching in Classroom