For what it's worth, I've heard a whole lot of above-average teachers complain about standardized testing, too. The things that one does in a classroom to optimize standardized testing performance are often not the same things one would do to optimize creative problem solving, or independent learning, or good citizenship, none of which are captured by (existing?) standardized tests. For that matter, the things that a third-grade teacher would do to optimize third-grade standardized test scores aren't necessarily the same things that the same teacher would do to optimize twelfth-grade standardized test scores.