In Class

I have eEnglish class tomorrow. In my class there are many differents types of people, including teenagers, those who are retired, and those who are unemployed. unemployment.
The teacher tell tells us every day that we must to change our seats so now after the site where we are sitting. So after  six months we know everyone. Nieves is a retired teacher who studies english because she has much free time, Chus is a teacher in a school and she needs a degree for her works. I am unemploment unemployed and so I have free time and I need to learn to speak english to get a good job.

Good job!

I'm not sure what you mean by "parter".

Unemployment is a noun. For example - "Unemployment is a serious problem in many countries." Unemployed is an adjective. For example : "I am unemployed." or "There are unemployed people in my class."

In Class

I have another English class tomorrow. In my class there are different kinds of people - teenagers, retired people (=retirees; jubilados en espanol?), unemployed people, teachers etc.

Our teacher tells us every day that we have to change from where we were sitting last lesson. So after six months of this we now know something about each other. Nieves, a parter??, is a retired teacher, and she is studying English because she has a lot of free time now. Chus is a teacher in a school and she needs a degree for her work. I am unemployed at the moment (unfortunately?) and I have the time to study and I need to speak English well to improve my chances (or have more opportunities) of getting a good job.

Buena suerte Heather

Well done! Please see my corrections below: 

In Class

I have English class tomorrow. In my class there are different people, teenagers, retired, unemployed.
The teacher tells us every day that we must change the place where we are sitting. So after six months we know each other. Nieves, a parter, is retired teacher, she studies English because she has a lot of free time, Chus is a teacher in a school and she needs a degree for her work. I am unemployed and I have free time and I need to speak English to get a good job.

In Class

I have english class tomorrow. In my class, there are differents people: teenagers, retired, and the unemployed.
The teacher tells us every day that we must change the seat where we are sitting. So after six months we know everyone. Nieves, a parter, is a retired teacher. She studies English because she has a lot of free time. Chus is a teacher in a school and needs a degree for her work. I am unemployed and have free time.  I need to speak English to get a good job.