Schools in the USA are a little different from schools in China.Usually, there is no uniform(校服)in the USA.In many Chinese schools ,Students have to wear school uniform..Classes begin at 8:30 each morning and the school day is over at 3:30 or 4 o'clock in the USA.In China ,classes begin at 8:00 in the morning and the school day is over at 5:30 in the afternoon.Students have one hour for lunch.and two 20-minute breaks(休息) each day in the USA.One break is in the morning , and the other is in the afternoon. In China,students have two hour for lunch and a ten-minute break after each class.In the USA, students often go to the school dining hall for lunch or at a break.They buy food and drinks there.But in China ,students often play games on the playground or have a break in the classroom after lunch or at a break.