lesson
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Imagine you have a giant pile of socks to count after laundry day.
Counting them one by one takes forever, but pairing them up lets us count twice as fast!
How does hopping past numbers work on a number line?
Hopping by Twos
When we skip count by 2s, we add 2 each time and skip over the number in between.
📊Create an interactive visual number line from 0 to 10. Show a cute frog or bouncy ball hopping along the number line with curved blue dotted arcs jumping from 0 to 2, 2 to 4, 4 to 6, 6 to 8, and 8 to 10. The landed numbers (0, 2, 4, 6, 8, 10) have big bright blue circular badges with white text. The skipped numbers (1, 3, 5, 7, 9) are faint gray with small 'X' or skip icons underneath. Include a label above each hop reading '+2'. Clean card design with white background (#ffffff), text #1e2945, border #e6e6e6.
Each hop adds 2, giving us the sequence: 0, 2, 4, 6, 8, 10.
What happens to the digits when we keep hopping past 10?
The Repeating Pattern
Look closely at the ones digit (the very last digit) of every number we land on.
📊Create a vertical pattern comparison card with three rows of numbers: Row 1 has [2, 4, 6, 8, 10], Row 2 has [12, 14, 16, 18, 20], Row 3 has [22, 24, 26, 28, 30]. In each number, highlight the ones digit in a bright yellow-gold pill badge with bold text (2, 4, 6, 8, 0) to clearly show the repeating pattern across all rows. Above the columns, show labeled header pills 'Ends in 2', 'Ends in 4', 'Ends in 6', 'Ends in 8', 'Ends in 0'. Clean layout, responsive down to 350px width.
The ones digit always repeats the pattern: 0, 2, 4, 6, 8. Any whole number ending in these digits is an even number.
Can we use this repeating rhythm to race all the way to 100?