A new study adds to the mounting evidence of lost learning due to school closures during the coronavirus pandemic, with the ability of students in early grades to read aloud quickly and accurately about 30 percent lower than normal over the past year. The research released Tuesday by Policy Analysis for California Education, an independent research center based at Stanford University, examined 250,000 oral reading fluency scores for students in first through third grade last spring and fall in over 100 school districts across 22 states.