3rd class looked at some of the the main types of bridges such as truss, beam and suspension and learned about the materials used as well as the shapes in the design that makes them stronger. They made some great sketches of these bridges:
They were then set the challenge to design a bridge out of straws that would hold up a tin of tomatoes! This was not an easy task. They used the STEM process - in their teams they discussed the type of design they would like to make; they then drew a sketch of their design and did their best to build it to look like the design. They then tried it out to see if it worked, and if it didn't they went back and made changes to the design and altered the structure. While the end products were not as aesthetically pleasing as they might have liked, the children really enjoyed working as engineers- designing, making, altering and remaking!