You have the upper class, the middle class, the lower class.

The lower class is also called the working class. Like middle and upper classes, lower classes can be divided into subsets. Working class, workers poor, and lower class. Compared to the middle class, middle school's educational background is low and income is low. Their work hardly needs skills and experience, and often do their daily work under close supervision. Under the working class, there are poor workers. Like the working class, they are immature and do low wage work. However, their work rarely provides benefits like health care and retirement plans, their position is often seasonal or temporary. They are tenant farmers, migrant workers, sweepers, and day laborers. There are also high school students. Some people can not read or write and can not read job advertisements

In American society, the middle class is usually divided into the middle class, the middle class, and the middle class. Middle and lower classes (sometimes called the middle class) are composed of about one-third of the family. It is about twice the middle class and the upper class. In junior high school and lower grade, we usually acquire university education and bachelor's degree and live comfortable life. The middle class and the lower class are one of the largest social classes comparable to the working class, and people think that it is growing.

However, sociologists Dennis Gilbert, William Thompson, and Joseph Hickey just divide the middle class into two groups. In their class model, the intermediate class consists of only one upper and lower intermediate class. As mentioned earlier, about 15% of the white-collar experts who received higher education belong to the middle class, whose salaries are usually 5 people, family income is 6 people. Semi-pros with several college degrees form the middle class. Their class model shows that the middle class is slightly lower than the middle class of the socio-economic class. Those blue classes, pink colors and private occupations are called working classes in these class models.