This is from the conjuring.pdf that INky linked me to in my MAP thread.
8+9=10+?
A. 6 B. 9 C. 6 D. 17 E. 7
Most fourth-grade students in the MAP norm group do not answer this question correctly. The more advanced concept of balance or equivalency within an equation is introduced in this item. This concept is fundamental to algebra and makes this much more than a simple arithme- tic problem. The student must know how to solve a prob- lem by balancing the equation.
WHAT? My 1st grader just looked at this and said "7."
