There was an unprecedented expansion of education in the Tudor period. Until then, few children went to school. Those that did go were mainly the sons of wealthy or ambitious fathers who could afford to pay the attendance fee. Boys were allowed to go to school and began at the age of 4, they then moved to grammar school when they were 7 years old. Girls were either kept at home by their parents to help with housework or sent out to work to bring money in for the family. They were not sent to school. Boys were educated for work and the girls for marriage and running a household so when they married they could look after the house and children. Wealthy families hired a tutor to teach the boys at home. Many Tudor towns and villages had a parish school where the local vicar taught boys to read and write. Brothers could teach their sisters these skills. At school, pupils were taught English, Latin, Greek, catechism and arithmetic. The pupils practised writing in ink by copying the alphabet and the Lord's Prayer. There were few books, so pupils read from hornbooks instead. These wooden boards had the alphabet, prayers or other writings pinned to them and were covered with a thin layer of transparent cow's horn. There were two types of school in Tudor times: petty school was where young boys were taught to read and write; grammar school was where abler boys were taught English and Latin. It was usual for students to attend six days a week. The school day started at 7:00 am in winter and 6:00 am in summer and finished about 5:00 pm. Petty schools had shorter hours, mostly to allow poorer boys the opportunity to work as well. Schools were harsh and teachers were very strict, often beating pupils who misbehaved.