Odd and Even Number Sorting Game
Sort number cards into odd and even piles and discover the pattern. A hands-on activity that makes this foundational math concept click through physical sorting.
What You'll Need
- 1Index cards with numbers 1-20
- 22 containers or paper plates
- 320 small counters (beans, buttons, coins)
- 4Marker
What You'll Need
Index cards numbered 1-20
2 containers or paper plates (labeled Even and Odd)
20 small counters — beans, buttons, or coins
A marker
How to Play
Shuffle the number cards.
Label containers: "Even" and "Odd."
Demonstrate with counters: 4 counters split into 2+2 = even. 5 counters = 2+2+1 left over = odd.
Sort each card. Use counters to test or the rule: even numbers end in 0, 2, 4, 6, 8.
Sort all 20 cards.
Line up each pile in order.
"See the pattern? Even numbers skip-count by 2: 2, 4, 6, 8, 10..."
Why It Works
Odd and even is the first encounter most children have with number properties — the idea that numbers have characteristics beyond their size. Using counters to physically split numbers into two groups makes the concept tangible: even numbers split perfectly, odd numbers have a remainder. The connection to skip-counting by 2s is an "aha" moment that links classification to pattern recognition.
Tips
Always start with physical counters. The abstract rule (look at the last digit) means more when it's grounded in a concrete experience.
Zero is even! It splits into two groups of zero. This surprises many children (and some adults).
Once 1-20 is sorted, try larger numbers: "Is 37 odd or even? Is 142?" The last-digit rule scales to any number.
Odd + odd = even. Even + even = even. Odd + even = odd. Discover these rules by testing examples.
Connect to real life: "Houses on one side of the street have even numbers. The other side has odd numbers. Why?"
Age Adaptation Tips
School-age kids can take more ownership. Let them lead the activity, experiment with variations, and explain what they learned.
Frequently Asked Questions
How long does this activity take?
This activity takes about 15 min, with 5 min of preparation time beforehand.
What materials do I need?
You'll need: index cards with numbers 1-20, 2 containers or paper plates, 20 small counters (beans, buttons, coins), marker.
What age is this activity for?
This activity is designed for 5-8 years. You can adapt it for younger or older children by adjusting the complexity.
Can this be done indoors?
This activity is designed for indoor play, making it perfect for rainy days or when you're staying inside.
How difficult is this activity?
This is an easy activity that requires minimal setup and supervision. Great for busy days or when you need something quick.
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