The most true-to-life set in the education aisle, printed front and back so older students recognize real denominations.
hand2mind builds this for classrooms that want bills students will recognize at a glance, so the artwork and layout track real U.S. denominations more closely than the toy sets. That extra realism is the whole point for money-skills lessons, but it is also why you keep it in the classroom: like all lawful play money it stays undersized and marked for teaching use, and it should never be handled as anything but a novelty aid. Skip it if you specifically want obvious cartoon money for young kids, where a less realistic set is the safer, simpler pick.