The Four 4s - but every time they say "4" it gets 4% faster - YouTube

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Four Fours Puzzle - Solution

September 2012 – reflections in the why

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Hello Learning!: Math Challenge- Four Fours
Hello Learning!: Math Challenge- Four Fours

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The Four 4's - YouCubed
The Four 4's - YouCubed

The Four 4s Challenge - YouTube
The Four 4s Challenge - YouTube

Four Fours Puzzle - Solution
Four Fours Puzzle - Solution

four-4s - RETHINK Math Teacher
four-4s - RETHINK Math Teacher

Pat'sBlog: Before There Were Four-Fours, There Were Four-Threes
Pat'sBlog: Before There Were Four-Fours, There Were Four-Threes

Four Fours Solutions
Four Fours Solutions

The Four 4s - but every time they say "4" it gets 4% faster - YouTube
The Four 4s - but every time they say "4" it gets 4% faster - YouTube

One of my favorite number activities is the 4 4s | 17GoldenFish
One of my favorite number activities is the 4 4s | 17GoldenFish

September 2012 – Reflections in the Why
September 2012 – Reflections in the Why