A Dallas ISD teacher has passed away after testing positive for COVID-19. The teacher was on staff at Nancy Cochran Elementary School in Oak Cliff. The district did not release the teacher's name. Superintendent Dr. Michael Hinojosa sent a letter to parents notifying them of the teacher's death and extending condolences to the family and school community. All the news you need to know, every day By clicking Sign Up, I confirmthat I have read and agreeto the and .…A Dallas ISD teacher has passed away after testing positive for COVID-19. The teacher was on staff at Nancy Cochran Elementary School in Oak Cliff. The district did not release the teacher's name. Superintendent Dr. Michael Hinojosa sent a letter to parents notifying them of the teacher's death and extending condolences to the family and school community. All the news you need to know, every day By clicking Sign Up, I confirmthat I have read and agreeto the and .WW…