🎲 Bump Game – One More, One Less (Number Sense Practice) 🎲

Make practicing one more and one less fun and hands-on with this engaging Bump game! Perfect for kindergarten and first grade, this game encourages students to think flexibly about numbers, build mental images, and strengthen early number sense—all in an interactive, playful way.

What’s Included:

• Printable Bump game boards and pieces
  
• Instructions for playing one more/one less Bump
  
• Multiple versions for differentiation and repeated practice
  
• Designed for small groups or math centers
  

Skills Practiced:
✅ Identifying one more and one less within 20
✅ Building number sense and mental math strategies
✅ Strengthening flexible thinking about quantities
✅ Encouraging AMC/Kathy Richardson-style conceptual understanding

Perfect for:

• Small group math centers
  
• Intervention or enrichment activities
  
• Independent practice or partner work
  
• Teachers looking for hands-on, concept-focused number sense games
  

💡 Tip: Pair with manipulatives or counters to provide visual and tactile support as students play.

Turn number sense practice into a game students love while reinforcing one more and one less in a meaningful, visual, and interactive way!

***You will need a 20 sided di and/or spinner

Bump: One More / One Less – Directions 🎲

Objective:
Be the player with the most markers on the board by the end of the game!

Materials:

• 1 Bump game board
  
• 2–4 sets of markers (different colors for each player)
  
• 1 die
  

How to Play:

1. Decide who goes first. Players take turns rolling the die.
   
2. Roll the die and find the number:
   

• If practicing one more, add 1 to the number you rolled.
  
• If practicing one less, subtract 1 from the number you rolled.
  

1. Place a marker on the corresponding number on the game board.
   

• If your marker is already there, you can “bump” off another player’s marker and take that space for yourself.
  
• If your own marker is already there, you can stack your marker to secure that space.
  

1. Continue taking turns until all spaces are covered or players decide to stop.
   
2. Count your markers. The player with the most markers on the board wins!
   

Tips for Success:

• Encourage students to say the number out loud before placing their marker.
  
• Use counters or ten frames to help students visualize the “one more” or “one less” concept.
  
• Play multiple rounds to reinforce mental math and number sense strategies.