Couse paragraph (the reasons for the failure of students)

Failure Of Students
There are 4 major reasons for the failure af students. The first cause is family. Family is very important for students. If students’ families are very peaceful, they are very succesful. For example,
my friend Veli is very succesful at his school and also he has a very beautiful family. If students are fail, their family usually doesn't have peace. For instance, my childhood friend Ahmet has failed for his lesson since his parent's divorce. The second couse is unhealthy eating. Students eating healthy meals are more successful than those eating junk food, because junk food is very dangerous for the brain and also it causes of obesity.
Another cause is students' study styles. Many students listen to music, while they study lessons. It is the wrong method, becouse the human brain can only do one job at the same a time. The fourth cause is sleep disturbances. Today, a lot of students go to the bad very late and they get up very early. This stuation is very bad, because they need sleep. If they dont sleep 6-7 hours, they can become a careless person. On account of this, many students can’t pass the their exams and they can’t be successful. As a result, if students want to succeed , they need to sleep regularly and lead a healthy life.

<em>[Good work.  Remember to put a space after all commas and periods.  You need to work on using the verb 'to be' (is, are, am, etc.).  It was missing several times.]</em>

Failure of Students

I think there are 4 major reasons for the failure of a student. The first cause is family environment. Family environment is very important for a student. If a students’ family is very peaceful, he is also very success at school. For example, my friend Veli has a very beautiful family and he is very success at school. On the other hand, my childhood friend Ahmet has failed for his lesson since his parent's divorce.

The second cause is unhealthy eating. Students eating healthy meals are more successful than those eating junk foods, because junk foods are very dangerous for the brain and bring on obesity. The third cause is students' study styles. Many students listen to music while they study. It is a wrong method, because the human brain can do only one job at the same time.

The fourth cause is lack of sleep. Today, a lot of students go to the bed very late and they get up very early. Sleeping is essential part of our life, especially for the teenagers in their growth period. If they do not sleep at least 6-7 hours a day, they gradually turn into a restless person and can’t pass their exams. In short, if a student want to succeed, he must have healthy living habits.

You have already a good correction by a native speaker. So, I rearrange your essay. I hope it helps.