How Many Times? (Smart Egg-Carton Grouping & Arrays)
Source:
Use an egg carton with IR sensors in each slot to explore equal groups. The system tracks how many marbles are in each cup and narrates the multiplication sentence.
Categorisation
Props & Materials Required
- •Empty 12-slot cardboard egg carton
- •Marbles, pom-poms, or rajma seeds (24 items)
- •Chalk or paper labels
Step-by-Step Instructions
1
Drop Marbles into Slots
Place 2 marbles in the first cup, 2 in the second, 2 in the third. IR sensors detect each marble dropped.
2
Smart Count
Speaker narrates live: 'Cup 1: two. Cup 2: two. Cup 3: two. That's 3 groups of 2!'
3
Multiplication Announcement
Speaker completes: '2 plus 2 plus 2 equals 6! Three times two is six!' Display shows '3 × 2 = 6'.
4
Regroup Challenge
Redistribute 12 marbles into 4 cups with 3 each. Speaker confirms: '4 times 3 equals 12!'
Why It Works & Notes
Multiplication is fundamentally repeated addition of equal groups. IR sensors in each cup provide instant feedback as children explore different groupings.