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聚焦曲线·赋能复习——高二圆锥曲线复习教研活动暨永嘉县碧莲中学结对帮扶交流活动

  • 2026-11-15 03:23:41
聚焦曲线·赋能复习——高二圆锥曲线复习教研活动暨永嘉县碧莲中学结对帮扶交流活动

11月12日至13日,浙江省徐登群名师网络工作室“聚焦曲线·赋能复习——高二圆锥曲线复习教研活动”暨永嘉县碧莲中学结对帮扶交流活动在永嘉县碧莲中学顺利举行。本次活动根据《浙江省教育厅办公室关于组织实施第五轮浙江省名师网络工作室项目的通知》,立足新高考与新教材要求,以高二“圆锥曲线”复习课例为载体,聚焦知识结构化与核心素养培育,研讨复习课“重结构、重方法、重规范”的实施策略。工作室主持人、学科带头人、骨干成员与碧莲中学数学教师共二十余人参加活动。

01  专题讲座:从“套路重演”走向“思维生长”

首先,文成中学钱风成老师以《以理育人,高中数学学困生思维生长路径》为题作首场讲座。钱老师从学困生的心理症结以及“依标命题、源于教材”的导向分析学生陷入被动应试的深层原因,并进一步以解析几何为例,梳理这门学科的两项基本任务,由此追问如何促进学生的思维生长。他以近年新高考卷为例发现命题的重心从“运算驱动”走向“思维驱动”,以硬算到底为特征的传统路径不再适配于如今的高考。因此,他建议教师在复习中着力关注几何语言翻译的多样性、代数手段运用的预判性、运算逻辑落地的高效性,以及二级结论记忆的必要性。

三门县第二高级中学许零筝老师作《以视角优化,破运算困局——高二解析几何专题复习的优化路径》讲座。许老师以2022年至2026年圆锥曲线大题的答题情况为样本作了思维导引统计分析,在此基础上提出三条教学导向:锚定教考衔接,依据课标不超标、回归课本不脱节;强化学科基础,检测学生知识体系,支撑学科素养提升;优化素材与呈现,展示思维过程,检测思维品质。同时,许老师提出了“解构—重构—实施—自我反思”的复习路径,主张沿着“真题—教材—课堂—拓展”的线索,把一道题讲成一个体系,启发学生思维,破开运算困局。

龙港市科技高中陈林洁老师作《少算不是不算,善思方能简算——解析几何专题研讨》讲座。陈老师提出,解析几何复习首先要“突出几何直观,考查几何基本量”。陈老师以一道“双根式和最值”的经典题为例,比较三角换元、柯西不等式、直线与椭圆相切等不同思路,体会“找平方关系”背后的几何意味,利用角公式快速处理角的计算。由此陈老师提出三条教学建议:课堂解题示范要强化“先画图后代数”的流程;解题评析中增设“路径预判”环节;开展对比教学,让学生直观感受硬算与几何优化两者计算量的差异。

02  公开课:把“少算”落实到课堂

11月13日上午,活动转入课堂展示环节。永嘉县碧莲中学项如意老师与洞头区第一中学林忠奶、陈嘉豪老师分别执教《直线与椭圆的位置关系》《直线与椭圆中的变量问题》《从点到直线——定值与椭圆的联系》三节复习公开课。三节课切口各异、指向相近,把前一日讲座中“重结构、重方法、重规范”的复习主张,落到了一节课的具体环节之中。

项如意老师执教《直线与椭圆的位置关系》,以“位置关系”为线索展开复习,引导学生在“多想少算、数形结合”中形成研究一类问题的一般思路,通过一道经典例题一题多解,让学生直观感受“多想少算、数形结合”。课堂小结凝练为“先用几何的眼光观察,再用代数的方法解决”,把复习课的落点放在研究方法的迁移上,让学生在“猜想—验证—证明”的过程中体会数形结合的分量。

林忠奶老师执教《直线与椭圆中的变量问题》,以“从定量到方程、再到函数”为主线,从一道以斜率之积为定值的母题出发求椭圆方程,再围绕“一条过焦点的弦”设计问题链。先是“定量→方程”,给出一个面积数值,求对应的直线方程;继而通过面积成倍数关系、不同三角形面积关系两组变式;最后是“定量→函数”,让定量动起来,求两个三角形面积之差绝对值的最大值。一条弦走到底,一题多变、层层递进,学生在变化中看清了“定量—方程—函数”的内在联系。

陈嘉豪老师执教《从点到直线——定值与椭圆的联系》,用“两条弦的斜率之积等于-b²/a²”这一条定值串起三个环节。首先是“中点弦”,由求以定点为中点的弦所在直线方程引出定值,接着是“原点对称”,把定值推广到椭圆第三定义,最后是“椭圆上点的切线”,把弦收缩为切点,定值在相切时依然成立,进而探究三角形面积是否为定值。三个环节层层递进,学生在一组变式中体会到“一个定值可以串起一类问题”。

03  评课议课:把题目的“底层逻辑”讲透

课后,郑寿好、李正茂两位老师分别作评课小结,两位老师都从课堂实际与亲身经历对三位老师的课堂实践做出肯定。

最后由工作室主持人做活动总结,复习课的题目选取要针对学生学情,脱离学情的“难题堆砌”只会加重负担;课堂上要加入对题目底层逻辑的分析,培养学生稳定的题目思维模式,而不是停留在套路的记忆上;复习课更要紧的是把已有知识按照新的规律排成“新东西”,教师需认真思考如何整理知识点,让学生写题时能够快速提取。

本次教研活动以三场专题讲座、三节复习公开课和评课议课为载体,为参会教师搭建了交流研讨、互学互鉴的平台。从“套路重演”到“思维生长”,从“运算驱动”到“视角优化”,与会教师在研课议课中逐步明晰了高二圆锥曲线复习的实施路径,聚焦曲线,赋能复习。此次活动推动教师进一步更新教学理念,明晰数学复习课的实施路径。

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  1. CONNECT:[ UseTime:0.000690s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001017s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000495s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000427s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000740s ]
  6. SELECT * FROM `set` [ RunTime:0.000395s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000864s ]
  8. SELECT * FROM `article` WHERE `id` = 548322 LIMIT 1 [ RunTime:0.000477s ]
  9. UPDATE `article` SET `lasttime` = 1794705078 WHERE `id` = 548322 [ RunTime:0.001453s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000403s ]
  11. SELECT * FROM `article` WHERE `id` < 548322 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000589s ]
  12. SELECT * FROM `article` WHERE `id` > 548322 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000544s ]
  13. SELECT * FROM `article` WHERE `id` < 548322 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000937s ]
  14. SELECT * FROM `article` WHERE `id` < 548322 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000895s ]
  15. SELECT * FROM `article` WHERE `id` < 548322 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000750s ]
0.107623s