Schools in Hartshorn, Missouri, the US. Schools locations in Hartshorn, Missouri. Find the nearest schools locations, near you. All types of business services Real estate School Travel All schools in Hartshorn Black Valley School School Hartshorn, Hartshorn, Missouri 65479 Write a review Phone Directions Lewis Hollow School School Hartshorn, Hartshorn, Missouri 65479 Write a review Phone Directions Round Valley School School Hartshorn, Hartshorn, Missouri 65479 Write a review Phone Directions