Bring the classic locker problem to life with this interactive digital activity designed for upper elementary students exploring factors, multiples, and patterns. Perfect for Illustrative Mathematics, Grade 4 Unit 1 Lesson 6, or any math class diving into number patterns, this engaging tool lets students click to open and close lockers while discovering which numbers leave lockers open, closed, or toggled the most.

This resource:

• Reinforces number sense through active, visual exploration
  
• Helps students concretely understand factors and multiples
  
• Requires zero prep. Just share the link and go
  
• Is perfect for whole-class demos, small group discussions, or independent discovery
  

What’s Included

• A digital Locker System Activation (interactive Canva site)
  
• Clear visual model that aligns with the locker problem in IM curriculum
  
• Works great on laptops, iPads, or interactive whiteboards
  

Concepts Covered

• Repeated reasoning and mathematical patterns
  
• Factors and multiples
  
• Odd vs. even numbers
  
• Visual representation of number operations
  

Standards Alignment

Common Core:

• 4.OA.B.4 – Find all factor pairs for a whole number
  
• 4.OA.C.5 – Generate and analyze patterns
  

Tech Requirements

This resource is hosted via Canva’s site tool and is 100% web-based. No downloads or logins required.

Ways to Use

• Math warm-up or lesson opener
  
• Interactive notebook activity
  
• Enrichment for early finishers
  
• Conceptual launch before factor pair lessons