测量长度（6岁以上）
Measuring length (age 6+)
使用相同大小的长度单位，将单位首尾相接、不留空隙或重叠地摆放，来测量物体的长度。
Measure the length of an object using same-size length units laid end to end with no gaps or overlaps
学习证据 / Evidence
- 用回形针首尾相接摆放来测量一本书的长度，并数一数用了多少个回形针
- 理解长度的测量结果就是覆盖被测物体的单位数量
- 摆放单位时要避免留下空隙或重叠
- Measure a book by laying paper clips end to end and counting them
- Understand that the length measurement is the number of units that span the object
- Avoid gaps and overlaps when placing units
评估问题 / Assessment
如果{{name}}用相同的玩具积木测量桌子的长度，能否做到把积木首尾相接、不留空隙地摆放，并说出桌子有多少个积木长？
If {{name}} is measuring the length of a table using identical toy bricks, can they lay them end to end with no gaps — and tell you how many bricks long the table is?