Telling Time CSI Math Mystery – Help your students master telling time to the hour, half hour, quarter hour, and to the nearest 5 minutes with this exciting detective-themed math activity! Designed for 3rd grade, 4th grade, and 5th grade classrooms, this printable resource transforms time practice into an engaging mystery game. Students solve puzzles with analogue and digital clocks, addition and subtraction of time, and 15-minute intervals while working to crack the case of “Who Stole Time?”