Lesson 3
Part 2

To Get to the Other Side: Designing Bridges

Bridging Understanding (2) / Grade 2 / Arlington, MA

The EIE Curriculum

EiE - To Get to the Other Side: Designing Bridges, L3 Part 2

Students perform a controlled test of three types of bridges to see how much weight the bridges can support.

Reflection Questions

What evidence do you see of Ann’s students beginning to think about how the materials could be used in their bridges?

Students make suggestions about what a material could be used for in their bridge designs, and also discuss how the properties of the material would make it a good choice for that function. 

  • During group work, we see students pointing out how they would use different materials for different bridge parts—one material could be a foundation for the bridge, another a railing, etc. (4:40)
  • As a whole class, students fill out the last column in the properties of materials chart, identifying how each material could be used in a bridge design. This allows students to share ideas across many groups. (5:45)
  • To further emphasize the relationship between material properties and uses, Ann asks students to think about why they would not want to use string as the span of their bridge. Students point out that it would be a bad choice because it might unravel and fall apart. (6:50)