my opinion about different rules in schools of my country and australia

In Iran schools are very different to Australian ones. Boys and girls are separate and not in the same class. Private schools are very expensive and many people can't afford them. However, public schools are cheaper but they are very low quality. Every three months there is a test for everyone and there are no assignments or assessments. There is nine months for school in Iran, and four months of holidays. When students come back to school they forget everything because of the long holiday.