The main religion which is being taught to students In Iran is Islam and its holy book called Quran. Students start to learn it at the elementary and secondary school (typically ages 7–14) and it is compulsory for them to learn it. The government try to hire teachers who are kind and convincing in order to teach religious content step by step to students. Other religions are not taught in public schools. There are some private schools for the recognized minority groups who have other religions, that is Zoroastrianism, Christianity and Judaism. These schools are supervised by the Ministry of Education which imposes certain curriculum requirements. The directors of these private schools must be Muslim, with few exceptions