知识点
<p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> 认识平行四边形</p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;">学习目标</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;"><font face="楷体_GB2312"> </font>1．使学生掌握平行四边形的意义及特征，了解其特性，能够正确画出底所对应的高．</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;">2．通过观察、动手操作，培养学生抽象概括能力和初步的空间观念．</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;">3、在活动中进一步积累认识图形的学习经验，学会用不同方法作出一个平行四边形，会在方格纸上画平行四边形，能正确判断一个平面图形是不是平行四边形；</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;">4、认识平行四边形的高，明白底与高的对应关系，能测量和画出平行四边形的高；</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;">5、培养学生实践能力，观察能力、分析能力。</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;">重点：</span><span style="font-family: 楷体_GB2312; font-size: 12pt;">掌握平行四边形的意义及特征．</span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;">难点：</span><span style="font-family: 楷体_GB2312; font-size: 12pt;">画平行四边形的高，明白底与高的对应关系。</span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;">梯形的认识：</span><span style="font-family: 楷体_GB2312; font-size: 12pt;">学习目标：</span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;"><font face="楷体_GB2312"> </font>1．使学生掌握梯形的特征和各部分名称，沟通梯形与其它平面图形的联系．</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;"><font face="楷体_GB2312"> </font>2．进一步培养学生的空间想象力及动手操作能力．</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;"><font face="楷体_GB2312"> </font>3．渗透数学知识来源于生活实际的思想，培养学生初步的创新意识．</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;"> 重点：理解梯形的概念，认识梯形的底和高并会画梯形的高．</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p> <p align="justify" class="p" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;line-height:18.7500pt;"> <span style="font-family: 楷体_GB2312; font-size: 12pt;"> 难点：整理所有四边形之间的关系，掌握各种图形的特征及其异同点．</span><span style="font-family: 楷体_GB2312; font-size: 12pt;"><o:p></o:p></span></p>题库
课后题
