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不同于教案的教学设计是什么?

  • 2026-05-11 02:45:06
不同于教案的教学设计是什么?

教师每天写备课教案,很累,而且写教案是为了检查,吾曾设想一个建议,每位教师每周只需写一个教学设计即可,教学设计与教案有什么不同呢?

从一般意义上说,教学设计过程就是备课的过程;具体设计请参考下一篇文章“您知道一节公开课能做哪些事吗?”

教学设计即选题,从教学实用性上说,教学设计的关键就是选题;

教学设计即课件制作,教师具体实践时,把教学设计理解为课件制作

从理论上说,教学设计是运用系统方法分析教学问题和确定教学目标,建立解决教学问题的策略方案、试行解决方案、评价试行结果和对方案进行修改的过程。

教学设计研究对象是教学系统。教学设计的研究目的是优化教学效果,具体来讲,就是提高教学质量和教学效率,使教学吸引人。

  教学设计是一项复杂的工作,因为教学设计的对象是人,其设计的主体也是人,而人是最为复杂的、最难以把握的,同时影响教学设计的因素也是复杂的。

教学设计在形式上可以千变万化,但是有一个基本的宗旨是不变的即为提高教育教学质量服务,为学生素质的全面发展服务。教学设计的宗旨可以概括为一句话:以学生的发展为根本。

教师运用系统方法对各种课程资源进行有机整合、对教学过程中相互联系的各个部分做出整体安排的一种构想,一个蓝图。即为达到教学目标,对教什么、怎样教,达到什么结果所进行的策划。

教学设计要在分析课程目标和教学任务、分析学生实际(学情分析)、分析教学环境与资源的基础上,完成确定的教学目标、制定教学策略、教学重点、教学难点和教学时间(包括教学程序的安排、教学方法的组合、教学组织形式的确定、教学媒体的选用等)、教学内容(教学过程)实施教学评价、编写教学计划等一系列的具体工作。

下面给出一次课程的教学设计结构:

寻找“数”的运算与“形”的挖掘的平衡点——求动点轨迹方程的突破口

教学设计人:余继光

教学目标:将求动点轨迹方程的基本方法融入数的运算与形的几何性质的挖掘之中,

重点:如何发现几何图形中的几何性质,建立这样一种思维习惯

难点:恰当地将数的运算与形的性质挖掘,寻找到一个合适的平衡点。

教学模式:问题、变式、反思、体验

教学设计:

由于内容中大量数学符号,将其省略

求动点轨迹常常涉及到数与形的转化,在“数”与“形”的转化过程中,如果不能把握其平衡点,往往会导致在“数”的运算中烦琐或“形”的挖掘中遇到障碍,因此问题探索者既要掌握“数”的运算基本方法,如斜率公式、点到直线距离公式、夹角公式、定比分点公式等,又要善于挖掘几何图形中隐藏的几何性质,以便于减少运算量,达到最佳解题效果。

圆锥曲线的离心率是高考中常考的一个知识点,年年高考年年有,变幻无穷新视角,今年江苏高考题将平面解析几何的基础问题——斜率、平行、离心率与向量有机结合,并与物理的光学知识结合,形成一个体现综合能力的基础题,我们要挖掘平行条件、反射条件以及准线知识才能确定离心率的大小。

在平面解析几何中,涉及线段长度,线与线的夹角,以及线与线的位置关系,而这些关系都可以用向量加以描述,因此向量与解析几何的融合呈现出一个命题特点。 

三种解法都是活用了几何性质,解析几何虽然是用代数方法解决几何问题,但它毕竟研究的是几何图形,因此在推理过程中巧妙地运用几何性质来简化运算,应该成为一种习惯的思维方法,

反思小结

在平面解析几何中,尤其是圆锥曲线问题,求动点的轨迹方程或其他问题,在通法的指引下,如果能够充分挖掘一下几何图形的几何性质,常常可以发现一些简捷的解法,它既可以减少运算量降低运算失误率,又可以减少解题时间,然而这过程中又增加了思维量,因此需要寻找一种平衡,根据自身特点,在平时加强这一方面的训练,

回顾平面几何中有关三角形、四边形和圆中的几何性质的复习。

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  1. CONNECT:[ UseTime:0.000609s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000772s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000324s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000256s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000636s ]
  6. SELECT * FROM `set` [ RunTime:0.000250s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000663s ]
  8. SELECT * FROM `article` WHERE `id` = 495285 LIMIT 1 [ RunTime:0.000430s ]
  9. UPDATE `article` SET `lasttime` = 1778999064 WHERE `id` = 495285 [ RunTime:0.000907s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000260s ]
  11. SELECT * FROM `article` WHERE `id` < 495285 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000571s ]
  12. SELECT * FROM `article` WHERE `id` > 495285 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000464s ]
  13. SELECT * FROM `article` WHERE `id` < 495285 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000797s ]
  14. SELECT * FROM `article` WHERE `id` < 495285 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000832s ]
  15. SELECT * FROM `article` WHERE `id` < 495285 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000797s ]
0.092172s