A divider element formed of a sheet member adapted to be removably coupled to a binding element of a coil bound notebook. The divider element includes a plurality of preferably T-shaped connector elements defining a narrow cut region and coil receiving aperture therebetween. Coil portions of a binding element may pass through the cut region into and out of the coil receiving aperture. The divider element is formed of a deformable material such the connector elements are adapted to be flexed out of the plane of the sheet member without substantial bending or breakage of the connector elements. The divider element may engage the coil portions of a binding element without significant manipulation of the connector elements by way of selectively urging the coil portions of a bound notebook in a direction parallel to the binding element axis.