Spectrum Money Flashcards - Spectrum Flashcards Author:School Specialty Publishing More than just the facts. Challenging games to develop critical thinking skills.The real way to learn money principles is to practice them. These flash cards, based on the proven McGraw-Hill math curriculum, help young learners master this important math skill. Plus these cards take young learners one step further, by offering creative activitie... more »s designed to develop critical thinking skills.« less