There are two versions of the Workbook - one that is in a 3-ring binder, and one that is a spiral-bound book.
There is also the option to have regular pages or laminated pages for the 3-ring binder version. The spiral-bound only comes in the laminated form.
The 3-Ring binder versions of the Workbook can be "opened" and you can customize the page order or add pages. The single-use charts and worksheets can be inserted and removed as needed. In the spiral bound version of the Workbook, these single-use charts and worksheets are separate from the main Workbook.