Everyone should (not) stay in school until the age of 18.

Everyone should stay in school until the age of 18.
Because
1) School provides students who are under 18 knowledge and skills.
+ Knowledge:
- provide them solid knowledge base to live and work in the future
- students are oriented to study what they want at university or work a job which is appropriate with them
+ Skill: help them to have softskills such as teamwork skills, communication skills,..
=> prepare childen to be the member of a society
2) This helps school manager to develop higher education
+ helps to maintain or limit the places at universities after graduation
+ filter the students who are really into highear education and this can helps them to optimize their academic performance

Em mới viết mở với đoạn 1 ạ.
It is true that there are some people who have been successful even though they left school in early age. While there are some good reason why this is the case, I personally believe that everyone should stay in school until they are eighteen.
To begin with, It is my belief that school provides a good environment for children. Firstly, schoolchild are taken care of by lots of virtuous teachers. These teachers would teach them the good idea of life which they can apply into situations in their futures. In fact, many people are influenced by their teachers, maybe more than by their parents. Secondly, school could limit the bad behaviors of students by strict management and punishment. For example, a student who rises in rebellion with others will be given reprimand and be penalized in front of class, so he might be ashamed of his action and not do it again.  
In addition to this, School also gives the needful and useful knowledge and skills for student’s future careers or for student’s higher education, especially which was learned in grade 10 to 12 when students are between 16 and 18.