Inspired by the best-selling novel "The Da Vinci Code," this imaginative cross-curricular resource is the perfect way to reinforce basic math skills as well as introduce the study of great "thinkers" to your class. A short biography is included for each featured "thinker" that contains secret, embedded information. Students must study the biography and crack the code to answer a set of worksheet questions. It is within these hidden codes that students will practice fractions, geometry. place value, and a variety of other valuable math skills.