Corrections: Feb. 19, 2021 Feb. 18, 2021 FRONT PAGE An article on Wednesday about Oregon’s halting efforts to return children to public school classrooms misidentified the grade levels that Seattle had proposed for in-person learning before later scrapping the program. They were prekindergarten through first grade; second grade was initially considered for inclusion but not part of the official proposal. NATIONAL An article on Thursday about Democrats’ public anger at Texas Republicans’ response to the collapse of the state’s power grid misstated the name of the operator of the state’s grid. It is the Electric Reliability Council of Texas, not the Electricity Reform Council of Texas.