http://australianteacher.blogspot.com.au/2012/12/installing-sage-mathematics-on-windows.html
At the end of this year, my school set our Year 10's some network theory as their last topic for assessment. I quickly needed a way to generate weighted networks for worksheets. Yes, hand-drawn would have worked, but like all things, once you put the effort into making a program, it's only a couple of edits and clicks to make multiple diagrams. Plus this way, I can also use the same SageMath worksheet to generate the answers as well.