This product is a differentiated math mystery that is aligned with the 4th-grade Engage NY/Eureka math curriculum and focuses on prime/composite numbers, factors, multiples, long division and multi digit multiplication. It includes a scenario explaining what the problem is- Mrs. Claus is missing. The product has a suspect list of 10 people (students should recognize many of the characters from movies and books!), and 5 clues that narrow down the suspect list to just one person. Each clue has a worksheet A & B and an answer key for all worksheets. Worksheet A for each clue aligns with the standards but at a lower level for students who struggle with this skill. Worksheet B is a more challenging version for higher-level students to offer enrichment. Worksheets A & B look the same; they have the same appearance clues and the letters are in the same spot on the equations. This allows students to work on the same assignment but at their instructional level to allow for more confidence and success. Or, mix and match between the worksheets to use which one best suits the needs of your class to use as whole group instruction. Review math skills in a fun and engaging way this holiday season!