This product is a Christmas-themed math mystery that correlates to the Engage NY/Eureka Math Grade 2 standards. The mystery introduces the crime, (someone stole Santa's sleigh a week before Christmas), has a suspect list featuring many names that children will recognize from movies/books, and five clue pages that require students to complete math problems to determine the clue to narrow down the suspect list. The clue pages include addition and subtraction within 100, using base 10 blocks to identify numbers, measurement, (identifying which school supply is longer/shorter), and comparing three-digit numbers.