3D Printing. What's that about?
You have probably heard about 3D printing but maybe don't know how it works and what it is used for. So firstly let's do a quick explanation of the most common technology. 3D printing is a form of additive manufacturing whereby the object is built up in layers. Each layer is about 1/10th of a millimetre thick. The printer takes material (usually a type of plastic), melts it and then forces it through a tiny nozzle before laying it down on the print bed. A quick 2 minute video showing this in action is here.
Before the printer can do any of this the object has to be modelled in 3D Computer Aided Design (CAD) software. There are free packages available to do this. I use TinkerCad but there are many others. If you aren't that skilled at this (like me!) then you can look at communities like Thingiverse where others put their creations online for you to download and then print at home.
Once you have the file from the CAD program (usually a STL file) then you upload that into your printer's software which will slice the object into thin layers and add weak supporting columns to any overhanging parts. The supporting material has to be broken off carefully by you after the print is completed. Finally the printer can start but it is a fairly slow process. Something the size of your pinkie would take around 1 hour.
So why do schools get these? Some might because they think it is a cool new gadget but as with all things I have been talking about the first thing to do before getting a 3D printer is to do some planning. The 3D print can be the final outcome of a project or it can be just a component of a larger project. Regardless, the 3D print is a means to an end so it is the end that needs to be focused upon.
So what have schools done with them? Often schools do a geography project where the school is mapped out and then drawn on paper or created with craft materials. Schools with a 3D printer can create scale models of the buildings and put together a replica of the whole school. Another school has done a pollution project and 3D printed their design solution to the problem.
So absolutely 3D printers can value add to the curriculum but it needs to be part of a broader plan to meet the Australian Government's goal to restore the focus on STEM. It will require upfront funding for (most importantly) teacher training and the printer (may need multiple due to the printing speed) and then some ongoing funding for consumables and maintenance.
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