Four complete math mystery investigations — one for each of four CCSS Grade 3-5 domains — at a significant saving over buying individually. The Math Whodunnit 4-Case Bundle includes Cases M-01 through M-04, covering Operations and Algebraic Thinking, Number and Base Ten, Fractions, and Measurement and Data. Each case in the series uses the same proven format: a short crime scenario, five investigation stations targeting real CCSS maths skills, a self-checking decoder mechanic where correct answe