Schools in Big Sandy, Texas, the US. Schools locations in Big Sandy, Texas. Find the nearest schools locations, near you. All types of business services ATM Bank Finance School Travel All schools in Big Sandy 5/5 Big Sandy High School School +1 903-636-5287 401 North Wildcat Drive, Big Sandy, Texas 75755 Write a review Phone Website Directions Harmony Independent School District School +1 903-725-5492 9788 Texas 154, Big Sandy, Texas 75755 Write a review Phone Website Directions Harmony Intermediate School School +1 903-725-5492 9788 Texas 154, Big Sandy, Texas 75755 Write a review Phone Website Directions Harmony ISD administration School 1000-1744 Jaguar Road, Big Sandy, Texas 75755 Write a review Phone Website Directions Harmony Junior High School School +1 903-725-5485 9788 Texas 154, Big Sandy, Texas 75755 Write a review Phone Website Directions