Learn more about Graham's Foundation of Fractions Workshop and get registered.

Check out Graham's Building Fact Fluency Toolkit for addition and subtraction.

standard: 3.OA.7&8

Download the Task

Act 1

Watch the video


  • How many knots will fit on the rope?   Estimate
  • Write an estimate you know is too high.  Write an estimate you know is too low.

Act 2

Length of rope 

The length of rope with one knot

Act 3

Click the link here to find more of My 3-Act Lessons