Here are some other choices.
WE have Rhonda here on our board who teaches us her way to do triangle squares (perfection)
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here are two other ways.
http://www.sundaybestquiltworks.com/...iangleDemo.pdf
you can make up to 32 at one time depending upon size.
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http://www.amazon.com/June-Tailor-Ha.../dp/B001TL2JIA
I add extra material if using June Taylor Ruler, With Rhonda's and stencils just do as directed.
I find if I use the stencils I still need to use the June Taylor Ruler. How ever, no papers and perfect half square & quarter square triangles every time.
All three really work.