平面图形与立体图形
Flat vs Solid Shapes
区分二维（平面）图形和三维（立体）图形
Distinguish two-dimensional (flat) shapes from three-dimensional (solid) shapes
学习证据 / Evidence
- 将图形分为“平面”和“立体”两组
- 解释圆形是平面的，而球体是立体的
- 判断给定图形是二维还是三维
- Sort shapes into 'flat' and 'solid' groups
- Explain that a circle is flat but a sphere is solid
- Identify whether a given shape is 2-D or 3-D
评估问题 / Assessment
{{name}} 理解像正方形这样的平面图形和像立方体这样的立体图形之间的区别吗？并且能把日常物品分类为平面或立体吗？
Does {{name}} understand the difference between a flat shape like a square and a solid shape like a cube — and can they sort everyday objects into flat or solid?