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See recommendations above for more details. On paper, students sketch a bridge that will print appropriately. Their product must use less than 50 grams of filament (it is important to note that there should be no way of the bridge touching anything between the two desks during the testing process).Ĭreate a unique bridge that supports the most weight in the class. To introduce the class to the project, put two desks 20 centimeters apart and inform the class that they will be responsible for creating a unique bridge that can support the maximum weight as tested during class. To ensure that students’ designs will be printed, check to verify that all unsupported structures are designed at an angle less than or equal to 45 degrees. Therefore, some of the more popular bridges (suspension, truss, etc.) are not easily designed on a 3D printer. Students have an understanding of forces.Īnything that students build needs to be supported.Students have a solid understanding of scale factor.Prior to incorporating this lesson into a unit, it is recommended that students have had training on Google SketchUp. Students have a good understanding of 3D modeling.String, a bucket, weights, and a scale for testing purposes.Pictures of bridges from around the world (see below for reference).At least one computer per group, loaded with Google SketchUp.Group Size: 3 to 4 students, depending on how many variations you would like students to compare within the class setting Students will design a bridge that allows for at least one figurine (LEGO mini, action figure, doll, etc.) to safely travel from one side to another.Students will design a bridge based on models discussed in class and researched within groups.Students will incorporate properties of bridge design to generate a sustainable structure.Students will create a bridge that spans a minimum of 20 cm.Students will create a bridge that uses no more than 50 grams of filament.Students will create a bridge that supports the most amount of net weight.3-PS2 Motion and Stability: Forces and Interactionsģ-PS2-1 Motion and Stability: Forces and Interactionsĭepending on the grade level and depth of understanding required, certain CCSS Math standards about equations are applicable.Ĭ1 : Make sense of problems and persevere in solving them.Ĭ2: Reason abstractly and quantitatively.Ĭ3 : Construct viable arguments and critique the reasoning of others.Ĭ4 : Model with mathematics.Ĭ5 : Use appropriate tools strategically.Ĭ6: Attend to precision.Ĭ7: Look for and make use of structure.