Divisibility Detective Teacher Guide
A comprehensive facilitator guide for teachers, including lesson objectives, timing, specific video pause points, answer keys, and pedagogical tips for teaching the rule of 12.
Twelve Tracker Slides
A detective-themed slide deck that guides students through the warm-up, video lesson, guided practice examples (264, 1104, 5823), and the main activity instructions. Includes embedded YouTube video and high-contrast visuals for classroom instruction.
Number Cracker Cards Activity
A set of 16 number cards and a matching sorting mat for students to practice applying divisibility rules. Cards include 3-digit and challenge 4-digit numbers to categorize by their divisibility by 3, 4, or 12.
Case Closed Exit Ticket
A half-sheet exit ticket asking students to apply the rule of 12 to the number 132. Includes space for work on both sub-rules (3 and 4) and a final conclusion. Duplicate format for easy printing and cutting.