Abstract: Tabbed dividers for use with protective sleeves of the type each comprising a receiving portion having front and rear sheets closed together along sealed edges thereof and left open along at least one unsealed edge for receipt of one or more pages between the sheets and a securing portion extending along a lengthwise one of said sealed edges of the retaining portion with a sleeve retaining feature for cooperation with a retaining mechanism of a binder. The tabbed dividers each comprise a separator page having a divider retaining feature thereon and a tab connected to the separator page to project outward therefrom at a widthwise edge thereof by a distance great enough to project outwardly past a respective widthwise edge of the receiving portion of the protective sleeve with the protective sleeve and the divider arranged face to face to align the sleeve retaining features and the divider retaining features.