While solving exciting criminal cases, students can playfully train important mathematical skills for grades 3 and 4. This is effortlessly achieved with the 9 short, thrilling mysteries in this volume. Students follow the exciting adventures of a group of children, help solve the cases, and are guaranteed to track down every culprit. The selection of topics covers the curricula for mathematics in grades 3 and 4. Additionally, it sparks a love for reading and improves reading skills. Motivating creative tasks also facilitate differentiation in the classroom. This volume includes: 9 exciting math mysteries, motivating worksheets for each mystery, and all the solutions.