认识面积
Understanding Area
理解单位正方形的面积是1个平方单位，并且一个平面图形的面积等于覆盖它所需的单位正方形个数，既不重叠也无空隙。
Understand that a unit square has one square unit of area and that the area of a plane figure is the number of unit squares that cover it without gaps or overlaps
学习证据 / Evidence
- 能识别一个单位正方形，并说出它的面积是1个平方单位。
- 能解释为什么一个由12个单位正方形覆盖的图形，其面积是12个平方单位。
- 能区分面积和周长是两种不同的度量。
- Identify a unit square and state its area is 1 square unit
- Explain why a figure covered by 12 unit squares has area 12 square units
- Distinguish between area and perimeter as different measurements
评估问题 / Assessment
如果{{name}}数出方格纸上长方形内的小方格，能否说出它的面积，并解释“一个平方单位”是什么意思？
If {{name}} counts the small squares inside a rectangle drawn on squared paper, can they tell you the area — and explain what "one square unit" means?