Instead of one worksheet, offer three versions of the same task. The core "middle" objective remains the same, but the "Low" tier provides more sentence starters, and the "High" tier requires more synthesis or analysis. 2. The "Floor and Ceiling" Approach
To understand why teaching to the middle fails, we must first understand the "middle" itself. The concept of the average student is a statistical convenience, not a biological reality. In the late 1940s, the U.S. Air Force discovered this the hard way when designing cockpits. They measured pilots on ten physical dimensions to design a seat for the "average" pilot. They failed dismally. It turned out that not a single pilot fell within the average range on all ten dimensions. Zero. teaching to the middle answer key