Not a teacher.
This is a classic example of what is called a "run-on sentence." It keeps on going and going without a proper ending. In general in English, each sentence should convey one idea, one thought.We are in the second class, study, strive, do my homeworks, obey the teachers and strive a lot to succeed every year, in the second, third, fourth, fifth, sixth year.
"We are in the second class. Study. Strive. Do YOUR homework [not plural]. Obey your teachers. "
It is better to have more, short sentences than to run-on. Then as you learn, you can start to use conjunctions. You continue:
"and strive a lot to succeed every year in the second, third, fourth, fifth, sixth year."
You already used "strive." Don't say it twice. Maybe eliminate it the first time, and here say "strive both now and every year." No need to count all of the years until you have a better mastery of when to poetically emphasize a point like this.
Student or Learner