The entire school at Hockaday will serve in a Dr. Martin Luther King, Jr., Celebration and Day of Service benefitting Habitat for Humanity on Friday, Jan. 18. The all-day event will feature Dallas Mavericks CEO Cynthia Marshall as the keynote speaker  followed by student performances to honor Dr. King and then a Unity Walk. In the afternoon, students will paint 60 large walls for Habitat for Humanity Homes.