Did You Know What a Quadrille Notebook Is?

Did you know what a quadrille notebook is?

I had never heard of this, but my son needed one for chemistry. Since I never took chemistry, I had no idea what we were looking for. We were told it was like a composition book, so that is what I originally sent. But what was meant is that the quad book is bound like a composition book, but inside the pages are all graph paper. This is to do formulas and labs on. I was confused though, since there are actually 5 squares per inch it is not really a "quad" book. We did find a proper "quad" book, but it's pages are perforated and therefore not appropriate for this class. We were able to find both notebooks at Office Depot.