A parent in Arlington, Virginia, slammed the teachers’ union in the state by editing an error-ridden letter that demanded officials delay reopening schools and posted the corrected version on social media. “Hey @VEA4Kids, are you going to send out more of these grammar worksheets over break?” the parent wrote on Twitter. “My kids and I had a great time spotting errors! Did we find them all?” The parent rewrote the lead sentence, which includes strange descriptions and the incorrect style for the planned return to school date: “On behalf of the members of the Arlington Education Association, this dire expression...