Lucia, I only took the minimumly required math in school. Who would of thought I would willingly be doing something that require it so much or that even with math it would be so fun. However, sounds like that would be a book I would used. I too got one of those calulaters but haven't used it much. It did help me get the measurement across to given square center so I could decide what size square I wanted to cut. :shock: Would like to get better at using but that might take away too much from my actual quilting time. :lol: