The practice mentioned by Sarah is a single act that has the ability to permeate an entire school population with the powerful message that everyone's religion and cultural beliefs are to be appreciated and not just tolerated.
A school with this type of ethos is viewed as welcoming and accepting and is necessary in a cosmopolitan society.
In my example the school I refer to is viewed as high achieving in the community and student achievement in all areas (sport, academics, chess etc) in both in school and out of school extracurricular activities are praised and celebrated at weekly assembly. The Principal also has what is referred to as "an open door policy" where parents can reach out in any situation for advice, support or even to voice a complaint or opinion. These two events contribute most to the current ethos of the school. Unfortunately being a denominational school we do not celebrate all religious festivals. However, students of all religions can and are encouraged to participate in the religious festival associated with the school.