The official language of Pakistan is Urdu, but most people also speak regional languages. These are Punjabi, Sindhi, Baluchi and Paktun. English remains the language of the educated and is used in commerce and government. Educational facilities have been expanding, but literacy rates are still lower than most countries in the region. The government has established Islamic schools in certain areas to ensure primary education and knowledge of religion. Locally based traditional schools have existed for centuries. The government encourages families to send children to school by providing scholarships and cash incentives. In the cities, many students attend private schools which are believed to provide a better standard of education. The children learn Islamic history and the it's basic tenets alongside academic subjects and languages. In urban areas, there are many vocational schools at which students learn a trade after finishing high school. College and university education depends on the financial and academic ability of the student. Pakistan has an affirmative action policy that favours rural students over urban ones. Pakistani students attend law school, or specialize in engineering, nuclear physics, and agricultural sciences, among other disciplines. Most colleges and universities are co-educational. Did you know? For children in Pakistan, primary education is not compulsory. In the cities, some children are expected to find jobs and work to help the family.