The National University of Lesotho International School (NULIS) is part of the National University of Lesotho and is situated on its campus.

Established in the early 1960s, the school offers education from grade 1 up to the British O-Level. The school's international status is recognized by bodies in Africa and Europe, and despite tremendous difficulties it strives to live up to these standards.

NULIS has been moulded into the institution it is today almost single-handedly by a Roshan Fitter , a strong willed woman from Britain, with Iranian roots. Under her leadership, the school saw its expansion from a small campus elementary school to a full scale elementary and primary school, that has consistently been ranked among the best in Lesotho. Over the last few years, every senior graduating class has produced students who have placed at the top of the nation - notably in 2000 when almost a third of the graduating class placed in the top ten list of best performance in the nation overall, including 2nd and 3rd place.