Complex sentence: The school is very competitive to join, and only the students who perform best in the Kenya Certificate of Primary Education are offered admission, though there has been controversy in the past where powerful politicians secure a place for their children though they did not perform well.
Split into simpler sentences: The school is very competitive to join, with only the top performing students in the Kenya Certificate of Primary Education being offered admission. There has been controversy in the past where powerful politicians secure a place for their children though they did not perform well.