Complex sentence: The school developed a reputation for excellence of education and for the value of subsequent career prospects, while the availability of boarding facilities at Regents Square made it practical for pupils to come from throughout the colony and from elsewhere in Africa.
Split into simpler sentences: The school developed a reputation for excellence of education and for the value of subsequent career prospects. The availability of boarding facilities at Regents Square made it practical for pupils to come from throughout the colony and from elsewhere in Africa.