when do most children start school in your country ?   In America , most children start primary school at the age of five .   How much time do primary school students usually spend at school every day ?   Kindergarten students usually only go to school for about four hours every day , but after that , they spend about eight hours in school every day .   do they have to go to school on Saturdays ?   no , most children in America only go to school Monday through Friday .   how many subjects do they have to study ? 