- Years 5-6
- To develop a model bridge using 3D modelling software and run an experiment to see which bridge can withstand the most weight hanging from it.
- 3 lessons
- Students gain knowledge of 3D modelling software
- Reinforce knowledge on geometrical shapes and the characteristics of particular shapes
- 3D Modelling software
- 3D printer + materials
- Bucket, water, hook, weight scales
- Safety glasses
- Lesson 1
- Students learn how to create basic geometric shapes in the 3D modelling program, as well as adding in resources such as image and using the relevant tools such as stretch, selection, movement tools etc.
- Group the students and ask students what the best way to test the limits of each bridge would be, and by using the least amount of resources. The best method generated will be used for the experiment. Once finished, every student has an opportunity to identify the strengths and weaknesses of each method and help agree on the finalised method.
- For the next lessons, we will assume the best method generated by a group of students was by hanging a hook on a particular part of the model bridge. This hook will be carrying an empty bucket and then filled up slowly until the bridge collapses. The amount of water that is contained in the bucket will be the determining factor of the weight limits of each bridge. Once tested the bucket is then emptied and the process is repeated until all bridges have been tested.
- Lesson 2
- Students are to first draft a 1:1 model bridge on paper; top view, side view, and front view. Each model bridge will be restricted to specific dimensions designed by the teacher, and must include a bar of sorts located on somewhere on the bridge that will be used to carry the hook.
- Once the draft has been created, students are to transfer a scanned copy of each view into the appropriate axis of the program to use as an in-program template.
- Develop the bridge models in the program.
- Print the 3D bridge models using a 3D printer
- Lesson 3
- Setup the equipment needed to test the weight limits of each bridge, and the necessary precautions to reduce hazards.
- Test the bridges as stated above in point 3 of Lesson 1.