THE BIOLOGY teacher was stunned when he saw the reading achievement levels of the 24 10th-graders in his class. He knew there were high and low performers, but the range, third-grade level at the bottom to a grade level of 18.6 at the top, was mind boggling. Maybe this was a reason the little prodigy was such a royal pain, and maybe this explained why a third of the class was having such difficulty meeting the biology standards required on the Gateway exam. No wonder a row of nearly comatose students arrayed along the back of the room required constant prodding from the teaching intern to even appear attentive. Maybe mastery of the biology standards was out of reach for many of his students. Nine students in the class were reading at or below the eighth-grade level. Seven were reading in the ninth- to 10thgrade range, and eight were at the 11th-grade level or higher. The biology text for the class had a 10.2 readability level. The teacher acknowledged that the textbook was too difficult for about one-third of his students, and he asked me if this remarkable range of reading proficiency was an aberration. I answered that it was not remarkable, not an aberration, and was indeed representative of the reading levels of 10th-graders across the country. It is an unfortunate fact that high school teachers in every state find themselves in the same position as this biology teacher. They do not know the reading levels of their students or how closely their instructional activities and materials match the abilities of their students. So let's consider some difficult and rarely asked questions. Why are we certain that student performance should have a minimum standard level set at each grade? Why aren't we as accepting of variation in the academic performance of children as we are of variation in their musical, mechanical, artistic, and athletic aptitudes? Why do we deny that children differ from one another in readiness for learning and in rates of mastering basic skills at least as much as they do in these other areas? The likely answer is that, like the 10thgrade biology teacher, we simply don't know how diverse our students are. What does the range of reading skills look like in each grade from first to 12th across the nation? Figure 1 illustrates graphically these grade-by-grade ranges. The data to prepare this figure were mined from the 1998 Normative Update for the Peabody Individual Achievement Test-Revised (PIAT-R). (1) [FIGURE 1 OMITTED] The chart reflects a representative sample of 3,184 students in kindergarten through grade 12. The horizontal lines indicate the range of reading achievement to be found at each grade level, extending from the first to the 99th percentile, so the range represents 98% of the students in each grade. (I removed the most exceptional performers at both ends of the scale.) The braces enclose the range of proficiency covered by the middle 50% of the students in each grade. The left-most brace is placed at the 25th percentile, and the right-most at the 75th. Notice that it is not until the fourth grade that we find no students at reading-readiness levels (all scores are at grade-1 level or above). The range in reading skill expands dramatically as students move up the grades. Because the range in the age of the students in each grade is only about 12 months, it is difficult for many educators to believe that the range in reading skill expands, not by months, but by years in grade-equivalents. The range increases from over four years in first grade to over 10 years by fifth grade. The PIAT-R has a ceiling score at 12.9. Notice that this level is reached by some students in the sixth grade, by more than 10% of eighth-graders, by a quarter of ninth-graders, and by more than a quarter of 10th-, 11th-, and 12th-graders. Notice, too, that a quarter of ninth-graders are reading at or below the seventh-grade level. Where then should we set our standards? …
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