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Bridge-Building and Explanatory Writing 2014 Project

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As a culminating task in our Pulleys and Gears (Grade 4) and Forces Acting on Structures (Grade 5) science units, students worked together in teams to build bridges out of popsicle sticks, straws, paper clips, toothpicks, string, elastics, paper and tape.

The class worked with Mrs. Black to define the requirements and Success Criteria for these projects.  The goal for Grade 4 students was to build a 30 cm lift bridge and swing bridge, using at least two pulleys. The goal for Grade 5 was to build a 50 cm bridge that could hold at least eight math textbooks.  Students made two attempts, building on the success of their previous attempt to improve their designs.  They kept detailed lab notes explaining their thought and building processes. Their lab reports became their explanatory writing pieces for literacy.

The following photo collage depicts the fun students had with this project. Click on any photo to enlarge it.

With this project, students had a great time learning some principles of design, through trial and error, and by building upon the knowledge they gained in their first trial.  They also learned how to write up detailed explanations using a standard lab report format.

Thank you for visiting our class BLOG.  If you have any questions or comments, feel free to e-mail me (Margaret Black): or to add a comment to this page.

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