Students who do not attend private schools in the United States will attend the public high school in their area.

This public school education is funded by the U.S. government, so there are no tuition fees for students who are U.S. citizens or have legal residency. In other words, high school education itself can be considered free. However, you should be aware that additional costs may arise related to school life.

For example, there may be costs for textbooks, school supplies, or some special programs such as club activities or sports. These costs can vary by school, and many times they are supported through assistance programs from the school or community. Additionally, there are educational institutions in the U.S. that operate separately from public schools, such as private schools and charter schools.

In the case of private schools, tuition is charged separately, so they are not free, but charter schools receive public funding similar to public schools, so they can usually be used for free. However, charter schools may have slight differences in their educational programs or operational methods, so it is advisable to check carefully.

In summary, most students receiving formal high school education in the U.S. attend public schools or charter schools in their residential areas, and in this case, tuition is free. However, it is also important to keep in mind that additional costs for learning materials or special activities may arise.

A high school diploma is generally seen as a starting point for personal growth, social entry, and future planning.

First, a high school diploma proves that a student has successfully completed a certain level of basic education. This implies that they have acquired knowledge through various subjects in social sciences, natural sciences, and humanities, as well as basic reading, writing, and math skills. Additionally, a high school diploma serves as an important milestone socially.

In the U.S., without a high school diploma, many job opportunities are limited, and even basic employment can become difficult. The diploma is recognized as a 'minimum level of education,' which allows individuals to pursue more specialized educational programs or gain competitiveness in the job market.

In fact, there are many jobs in the U.S. that require a high school diploma as a minimum condition. Here are some representative jobs.

1. Police Officer
   Police officers require a high school diploma as a basic qualification and receive specialized training through a police academy. They play an important role in ensuring public safety, and the experience gained in the field is a significant asset.

2. Firefighter
   Firefighters are also among the professions that require a high school diploma. They must undergo training at a fire academy and practical experience to develop the ability to respond quickly in emergencies.
   

3. Postal Service Worker
   The U.S. Postal Service requires a high school diploma as a basic qualification, and after hiring, employees perform tasks such as mail processing, delivery, and customer service. It can be considered a stable public service job.

4. Truck Driver
   A high school diploma is the minimum requirement, and obtaining a commercial driver's license (CDL) allows one to work as a truck driver. This is a high-demand occupation in the U.S., where the logistics industry is thriving.

5. Administrative Assistant
   Administrative assistants, who handle administrative support tasks in businesses or organizations, are often hired with a high school diploma as a basic requirement. They can gain experience while performing various administrative tasks in an office environment.

6. Army
   When applying for enlistment in the U.S. Army, Navy, Air Force, or Marine Corps, a high school diploma (or GED) is required to apply.

7. Retail Sales Associate
   From large supermarkets to specialty stores, retail sales positions often require a high school diploma as a basic requirement. Employees can gain sales experience through customer service and product management.

8. Security Guard
   Security guards, who are responsible for safety in buildings, shopping malls, and public institutions, must have a high school diploma. They acquire the ability to perform their duties through additional certifications or on-the-job training.

9. Construction Laborer
   Construction laborers require a high school diploma and can learn various skills and experiences on the job site. While it primarily involves physical labor, skilled workers can earn good wages and have opportunities for advancement.

10. Warehouse Worker
    Warehouse workers in large distribution centers or logistics warehouses require a high school diploma as a minimum qualification. They are responsible for managing the inflow and outflow of goods and organizing inventory, and recently, they often collaborate with automated systems.

In Korea, the significance of a high school diploma aimed at college entrance is not felt as strongly, whereas in American dramas or movies, the term 'high school diploma' is often mentioned. This may be due to the cultural background of the 60s and 70s, where individuals could become independent right after graduating high school without pursuing higher education.