The teachers' staff-room is a charming thatched building adjacent to the classrooms overlooking the dusty recreation and assembly ground at Good Hope Basic Primary School in Bentiu, the capital of oil-rich Unity State in South Sudan.
Bentiu is near the disputed border with Sudan and within striking distance of Sudanese fighter jets and warplanes.
There's a tense calm at South Sudan's front line, just 10 miles from the frontier with Sudan, its neighbor to the north. South Sudanese commander Maj. Gen. Mangar Buong says his troops remain on alert and on the defensive.
There is not a civilian in sight. They all fled the area, known as Panakuach, after Sudan's recent aerial bombardments and escalating concerns about a full-scale war.