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The latest 4th grade reading scores for U.S. students made the front page of The New York Times with the headline: 鈥淕ap Between Best and Worst Widens on U.S. Reading Test.鈥� The reporter, Kate Zernike, observed that after a 鈥渄ecade-long emphasis on lifting the achievement of all students ... the release of the scores led to a round of finger-pointing over the cause of the growing gap.鈥�

That would lead to some tired fingers. The gap has persisted for half a century. On that front鈥攏othing new.

If not exactly news, the continued verbal gap between rich and poor students does deserve to be on the front page, not because of anything that happened or didn鈥檛 happen last year, but because the 4th grade reading gap (which widens in each succeeding grade) represents the single greatest failure in American public schooling and the most disheartening affront to the ideal of democratic education.

This latest reading report from the National Assessment of Educational Progress documents a steady state. It shows no significant overall shift in American students鈥� reading proficiency, nor any drastic widening of the already-large reading gap in 4th grade between rich and poor students. In 2000, there were minor gains at the top, and slight declines at the bottom, but no global change in overall achievement or in the gap between middle-class and low-income students, a gap that has been a disturbing feature of American schooling for at least 50 years.

Before NAEP began to record such findings, the 4th grade reading gap had been documented by Walter Loban in the 鈥�50s and 鈥�60s, then by Jeanne Chall in the 鈥�70s and 鈥�80s. In 1964, Mr. Loban published a graph that still defines early reading in the United States. It co-ordinated achievement along the vertical axis and student age along the horizontal. On this matrix, he plotted two lines showing the performances of low- and high-income students. The graph looks like a tilted funnel, with the narrow end at the left starting at kindergarten. In kindergarten, the two sides of the tilted funnel are fairly close. They begin to separate sharply around grade 4. After that, the gap keeps the same heartbreaking trajectory. Jeanne Chall called this sharp widening 鈥渢he 4th grade slump.鈥� The latest news from NAEP about 4th grade reading is, in short, anything but new.

For the past four years, I鈥檝e taught a graduate course at the University of Virginia school of education that has focused on the causes and cures of the test-score gap. Over those years, my students and I have looked at the work of the most distinguished researchers in sociology, economics, social psychology, cognitive psychology, and educational history. We have also looked at reports from the field.

Some of the news from the field is promising. A few schools, even a few districts such as Inglewood, Calif.鈥攚hich serve many low-income students on free and reduced-price lunch鈥攈ave made inroads into the test-score gap. And some reading programs like Open Court, Success For All, and Direct Instruction have, when well implemented, raised reading skills (decoding)鈥攗p to a point. But the early gains from those programs tend to fade by 4th grade, and students still suffer the Chall 鈥�4th grade slump.鈥�

Even the most effective public schools, like Nancy Ichinaga鈥檚 Bennett-Kew School in Inglewood, have not been able to raise the verbal scores of disadvantaged students up to the level of their math scores. On the other hand, the gap-closing scores from some Core Knowledge schools are very promising. But as the president of the Core Knowledge Foundation, I am not the proper person to press that point. Rather, I shall summarize how the early reading gap can be reduced in all schools, if they will combine intimately a carefully worked-out reading (decoding) curriculum with a carefully worked-out content curriculum that develops academic knowledge and oral language during the long periods in the early grades that are currently (and very ineffectively) devoted to 鈥渓anguage arts.鈥�

Although such an approach will greatly reduce the reading gap in all schools, no schools that I know of, including those calling themselves 鈥渃omprehensive鈥� and those calling themselves 鈥淐ore Knowledge,鈥� have effectively integrated the time spent on reading 鈥渟kills鈥� with time spent on 鈥渟ubject matters鈥� during the long periods devoted to 鈥渓anguage arts鈥� in the early grades. Instead, those critical periods of the day are devoted to a fragmented hodge-podge of mainly fictional stories鈥攐n the unexamined assumption that fiction is the essence of 鈥渓anguage arts.鈥� This emphasis on 鈥渋maginative fiction鈥� and this lack of emphasis on history and science, or even on systematically enhancing basic speaking and listening skills, is yet another vestige of the romantic movement鈥檚 emphasis on natural development and 鈥渃reative imagination,鈥� and yet another barrier to narrowing the equity gap.

To understand what needs to be done, it鈥檚 necessary first to grasp the cause and character of the current reading gap. And to view the gap accurately, it鈥檚 essential to give it a new name. The gap can鈥檛 be confined to reading, because it starts long before children are readers, and continues long after they have mastered decoding skills.

From age 2 on, there exist large differences in children鈥檚 familiarity with unusual words, standard pronunciation, and complex syntax, a fact that was long suspected, but not well documented and quantified until the monumental research of Betty Hart and Todd Risley, as summarized in their book Meaningful Differences. Many a low-income child entering kindergarten has heard only half the words and can understand only half the meanings and language conventions of a high-income child. Our schools, as currently constituted, do not reduce this original knowledge/vocabulary gap.

The verbal gap is not effectively compensated for by programs like Direct Instruction and Success For All that bring children to fluency in decoding skills, yet do not sufficiently and systematically enlarge their vocabularies. Low-income children who read with fluency still typically show big deficiencies in vocabulary and comprehension. Hence, instead of the term 鈥渞eading gap,鈥� clarity would be better served by using a more descriptive term like 鈥渓anguage gap鈥� or 鈥渧erbal gap.鈥� Such a shift in terminology might reduce public confusion between 鈥渞eading鈥� in the sense of knowing how to decode fluently, and 鈥渞eading鈥� in the sense of being able to comprehend a challenging diversity of texts. It is the second, comprehension, deficit, based chiefly on a vocabulary deficit, that constitutes the true verbal gap indicated in the NAEP scores.

The widening of this verbal gap as students progress through the grades is the archetypal example of the so-called Matthew effect in education, 鈥渦nto every one that hath shall be given, and he shall have abundance, but from him that hath not shall be taken away even that which he hath.鈥�

Cognitive psychologists have explained the mechanism for the Matthew effect, which is made even more acute by subsequent social and emotional influences on the low- vocabulary child. Experts in vocabulary estimate that to understand spoken or written speech, a person needs to know about 95 percent of the words. The other 5 percent of word meanings can then be inferred from context. If we assume that an advantaged kindergartner knows 95 percent of the words in a teacher鈥檚 remarks, or in a passage read aloud from a book, the result is that the child is not only gaining new knowledge from the exposition, she is also gaining new word meanings, by being able to infer the meaning of the other 5 percent of the words鈥攁chieving a gain in both world knowledge and in word knowledge.

The less advantaged child, by contrast, suffers a double (or triple) loss. The exposition is puzzling from the start, because the child doesn鈥檛 know enough of the words. He therefore fails to gain knowledge from the exposition, and also fails to learn new word meanings from the context. And to intensify that double loss, the child loses even that which he hath鈥攈is interest, self-confidence, and motivation to learn.

Multiply that experience by dozens of similar daily experiences, and the underlying cause of the widening verbal gap becomes clear.

How can the gap be reduced? The Coleman Report of 1966 disclosed that a child鈥檚 initial advantage of family and peers was more important to academic achievement than the school he or she attended. Then, in his later career, James S. Coleman, a hero to my students who have studied the test-score gap, devoted his extraordinary scholarship to qualifying that conclusion. Schools could reduce the academic- achievement gap, he found, by becoming more 鈥渋ntensive,鈥� by devising explicit academic standards for each grade, and making sure that every child meets those expectations. Since children are not at school all day and all year, school time must be used effectively. Coleman found that schools, both public and private, that maintained this 鈥渋ntensiveness鈥� provided much greater equality of educational opportunity than those that didn鈥檛.

Coleman鈥檚 conclusion has been amplified by cognitive psychologists. The advantaged child has gained knowledge and a correspondingly large vocabulary chiefly by gradual, implicit means. The child has been read to, has heard complex syntax, has been told about the natural and cultural worlds in the ordinary course of growing up. This indirect and implicit mode of learning is excellent if one has lots of exposure and lots of time, as an advantaged child typically does. But the disadvantaged child has to make up for lost time, and cognitive psychologists tell us that this requires a very systematic, analytical, and explicit approach to early learning. If you want to learn fast鈥攂e explicit. Break down each domain to be learned into manageable elements that can be mastered. Then systematically build on that knowledge with new knowledge. This is the most efficient mode of learning for everybody, but it is the essential mode if the aim is making up for lost time in knowledge and vocabulary.

That is the basic principle for overcoming the verbal gap. First, define the deficit by determining what knowledge and words are lacking. Then effectively teach that knowledge and those words.

My students and colleagues have some definite ideas about how to do this, ideally starting in preschool. Some enabling words and concepts will need to be taught directly, and we must do this systematically, as Andrew Biemiller has recommended. Yet we are well aware that most words will continue to be learned indirectly, in context, which is all the more reason to make sure that the context is carefully and cumulatively sequenced so that every child understands it, and makes new gains in knowledge and vocabulary.

Children learn and remember what is meaningful to them. History and science become meaningful if they are taught in a sustained and coherent way. All those currently fragmented hours devoted to 鈥渓anguage arts鈥� need to include the worlds of nature and history, literature, art, and music that will build the knowledge and vocabulary of children, and enable them to become readers in the true sense.

My graduate course on the verbal gap always ends in optimism. By the time we have gone through the relevant research, my students (who are mostly teachers or teachers-to-be) have concluded that the main barriers to equal educational opportunity are those that have been erected by unfortunate habits of mind in the schools, and by an unfortunate tendency to believe that the job can鈥檛 be done. While Jeanne Chall and James Coleman (and others) are my students鈥� heroes, their only villain is the complacency caused by social determinism and IQ determinism鈥攙iews which have currency only because we haven鈥檛 yet managed to narrow the verbal gap.

Before giving way to determinism, however, we need to transform the hours devoted to the literacy block in preschool and in the early grades by doing what works best, according to the ablest researchers: providing an explicit, coherent, and carefully cumulative approach to a broad range of knowledge and language.