Previously, I discussed two observational studies (a landmark from the 1970s and a valuable recent effort). Both aimed to determine the amount of reading comprehension instruction in American schools. That’s an endeavor that requires clear definitions. According to the older study conducted by Dolores Durkin (1978), comprehension instruction included any action teachers took to help children “understand or work out the meaning of more than a single, isolated word.” The newer study, this one by Philip Capin and colleagues (2024), didn’t provide a definition as much as a...