Structure of a left-handed folder
I turned the right-handed binder upside down to show how it needs to be made for the left-handed. The ring system is on the left because you scroll to the right with your left hand. This means that the lever for opening has to be down so that I can also open it. The sheets must be punched on the right. The hole in the spine of the folder is too far up, it has to be down. Since humans only learn by observing, left-handed people can only be taught by left-handed people. There's never anything else.