“计量时间”单元试教报告

钱军红

摘要编者和试教团队对“计量时间”单元进行多轮试教，总结出主要教学实施建议。应注重单元整体教学;单元起始教学应挖掘学生经验，聚焦单元大问题;探索计时规律的教学要充分考虑影响实验成败及课堂可行性的各种因素，整合优化实验活动，包括实验器材、方案、展开过程等，助力学生高效完成实验，获得可靠数据，利用直观化的统计图表等引导学生对数据经验进行整理分析，形成理性认识，同时注意活动间的内在结构，建构相关的科学概念，引领学生思维纵深发展;在制作计时器的教学中要权衡好充分经历与精选内容，领会活动对学生发展的价值;单元整理教学要求整理中有新发现，勾连（科学与生活）中有新发现。另外，教学内容可整合补充，融入PBL、STEAM等思想。

关键词试教报告;教学实施;单元教学;建议

中图分类号：G424文献标识码：ADOI：10.16400/j.cnki.kjdk.2021.36.018

Trial Teaching Report of "Measuring Time" Unit

QIAN Junhong

（Hangzhou Wentao Primary School，Hangzhou，Zhejiang 310052）

Abstract：The editor and the trial teaching team conducted several rounds of trial teaching on the "measurement time" unit and summarized the main teaching implementation suggestions. We should pay attention to the whole unit teaching;In the beginning of unit teaching，we should tap students，experience and focus on the big problems of the unit;In the teaching of exploring the timing law，we should fully consider various factors affecting the success or failure of the experiment and the feasibility of the classroom，integrate and optimize the experimental activities，including experimental equipment，scheme and development process，help students complete the experiment efficiently，obtain reliable data，and guide students to sort out and analyze the data experience by using intuitive statistical charts to form a rational understanding ，At the same time，pay attention to the internal structure between activities，construct relevant scientific concepts，and lead the in-depth development of students，thinking;In the teaching of making timers，we should weigh the full experience and selected content，and understand the value of activities to students，development;Unit sorting teaching requires new discoveries in sorting and new discoveries in linking （Science and life）. In addition，the teaching content can be integrated and supplemented，integrating PBL，steam and other ideas.

Keywords：trial teaching report;teaching implementation;unit teaching;suggestion

计时工具的不断改进、发展，是“计量时间”单元编写的一条明线;学生研究计时工具的方法、能力不断提升，构成了本单元的一条暗线。我们对本单元进行了试教，下面谈谈试教的实践与认识。

1注重单元整体教学

在分析单元结构时，我们认为，要使教学更有成效，必须注意课与课的内部联系，注重单元整体教学。

单元起始课中，燃香实验比较简单，影响因素比较少，可以作为范例让学生前期学習。燃香实验具有范例性，其实验方法、实验工具、实验后的整理和分析，都对后面的探究水钟、摆钟起到了示范作用。……