(一)说教材充分发挥学生的主体作用 ,通过学生的大胆猜测及自主探索 ,使其积极主动地参与知识形成的全过程。培养学生的创新精神和实践能力 ,是当今素质教育的核心所在 ,在这个思想的指导下 ,我设计了“三角形的认识”这一课 ,这部分内容是在学生初步认识了三角形以及学习了角 (A) that teaching materials give full play to the students the main role, through the students' bold guess and independent exploration, make it actively involved in the whole process of knowledge formation. Under the guidance of this thought, I have designed the lesson of “the cognition of the triangle”. This part is about the students' initial understanding of the triangle and the study of the angle