The implication is clear. The best way to boost students’ reading comprehension is to expand their knowledge and vocabulary by teaching them history, science, literature, and the arts, using curricula that that guide kids through a logical sequence from one year to the next: for example, Native Americans and Columbus in kindergarten; the colonial era and the American Revolution in first grade; the War of 1812 and the Civil War in second grade, and so on. That approach enables children to make sense of what they’re learning, and the repetition of concepts and vocabulary in different contexts makes it more likely they’ll retain information. Not to mention that learning content like this can be a lot more engaging for both students and teachers than the endless practice of illusory skills.