Here's the math problem, which was released as part of a "prototype project" by the Partnership for Assessment of Readiness for College and Careers and its university partners (it's available on theThe Mathematics Common Core Toolbox website). 

A group of teachers at a conference recently spent a few minutes looking over the problem ("This is tough," said a math coach. "I'm surprised this is 4th grade," remarked a teacher-educator). Afterward, the group listed what students need to know and be able to do in order to complete it. Here's what they came up with:

• The definitions of perimeter and area
• How to find perimeter and area
• The definition of a square mile
• The properties of a rectangle
• How to solve for an unknown in a perimeter
• Multiplication (up to multi-digit)
• Addition and subtraction (up to multi-digit)

The teachers then looked at the scoring rubric below. It shows that students get credit for finding the missing side length, for finding the area of the park, and for calculating the final number of deer. They can also get partial credit for each piece if they make minor calculation errors (the tasks will be graded by hand).

Read more in an article from Ed Week by clicking here.