Old School is a set of graphic frames intened to be printed on acrylic or velum sheets.  Those sheets would be placed over cards or used in photo books and scrapbooks.  Pictures should be glued to the front with old school mounting corners.  Of course they could always be placed behind the acrylic as well allowing both the pic and the print or color from the card or photo page to shine through. Only the styles with the gray centers are prepared for acrylic.