Here are some other choices.
WE have Rhonda here on our board who teaches us her way to do triangle squares (perfection)
here are two other ways.
http://www.sundaybestquiltworks.com/...iangleDemo.pdf
http://www.amazon.com/June-Tailor-Ha.../dp/B001TL2JIA
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.
Have fun. :)