something happened in the kindegarden I work

I am a teacher in a kindegarten and I like my job very much. I teacher English in year two. The children in my class are from 4 to 6 and they are very lovely. In fact, it's diffcult to teach them English because we just speak English in class, and there isn't much time in class; so they don't speak English often. It's a headache, I don't know how to improve their English speaking. Maybe they are too young to study English.
Today I taught them to know the words from Monday to Sunday and some colours. It is so hard to make them listen carefully. If the sentences I speak are longer they will begin to do something to disrupt the class because they can't understand and they are not interested in what I said already.
I am so happy to be with the children. But sometime I also feel angry with them. They often make a big noise and the boys like fighting. I love my job still and it's always been my dream to be a kindergarten teacher. I like singing, dancing and playing the piano. I am an intern in the kindergarten and I will graduate in July this year. I learned a lot in the kindergarten. I believe that I will be a good kindergarten teacher.

The second year of school is called 'year two' or 'grade two', not 'class two'.

"...the time in class is not so much" makes sense, but sounds a little forced.

"...they will begin to do something to influence the class" is correct, except I don't think 'influence' gets your meaning across.

"kindergarten teacher" is two words.

If the kids are struggling with English, you should send them here! :-)