Peterson's Last Challenge is a unique interactive math mystery that combines video clips and print material - all the clues your students will need to solve this engaging and challenging mystery. This mystery covers the Number System domain: Apply and extend previous understandings of multiplication and division to divide fractions by fractions. The Plot: When millionaire Gabe Peterson dies, he leaves half his fortune to his family. The other half will go to dog shelters around the country - but only if students can discover the name of his first dog. Family members and friends provide clues in the form of reminiscences - a childhood newspaper route, a camel race, a tale of espionage - that include math riddles. But not everyone wants to help solve the challenge. Who is being deceptive?  The answer (and the dog's name) are in the numbers. The Student Investigation Workbook helps scaffold learners toward grabbing the reward! Includes Resource Guide.