NAEP doesn’t measure performance in terms of grade-level achievement. The highest level of performance, “advanced,” is equivalent to an A+, representing the highest possible academic performance. The next level, “proficient,” is equivalent to an A or a very strong B. The next level is “basic,” which probably translates into a C grade. The film assumes that any student below proficient is “below grade level.” But it would be far more fitting to worry about students who are “below basic,” who are 25 percent of the national sample, not 70 percent.