Complex sentence: Houses provide lowers school students with a sense of community and encourage competition to strive for achievement, it is in affect for upper school students aswell but they generally disregard the cataderal names and stick to the more commonly used letter name of the houses.
Split into simpler sentences: Houses provide lowers school students with a sense of community and encourage competition to strive for achievement. It is in effect for upper school students as well but they generally disregard the cathedral names and stick to the more commonly used letter name of the houses.