长度测量（10岁以上）
Measuring length (age 10+)
认识体积是立体图形的一个属性；理解棱长为1个单位的单位立方体有“1个立方单位”的体积，并可用它来测量体积；由n个单位立方体填满的立体，其体积为n个立方单位。
Recognise volume as an attribute of solid figures; understand that a unit cube (side length 1 unit) has 'one cubic unit' of volume and can be used to measure volume; a solid packed with n unit cubes has volume n cubic units
学习证据 / Evidence
- 解释“体积”对立体图形意味着什么，以及它与“面积”有何不同
- 识别单位立方体，并解释它代表一个立方单位的体积
- 通过数出填满一个小立体图形的单位立方体来确定其体积
- Explain what 'volume' means for a 3D shape and how it differs from area
- Identify a unit cube and explain that it represents one cubic unit of volume
- Determine the volume of a small solid by counting the unit cubes that fill it
评估问题 / Assessment
如果{{name}}用小正方体搭成一个立体图形，能否通过数小正方体来算出体积，并解释“一立方厘米”在日常生活中是什么意思？
If {{name}} builds a solid shape using small cubes, can they count the cubes to find the volume — and explain what "one cubic centimetre" means in everyday terms?