Another busy week has passed. Something unexpected happened this week. A teacher quit his job suddenly following an argument with another teacher. What's more, he told his students that he was being forced to leave by the other teacher, and this created chaos among the students. Some students even became hostile toward the other teacher. Never had I imagined I might encounter something so dramatic as a teacher. Even though my job often wears me down to thoughts of quitting, I think this particular teacher handled himself in an irresponsible, even childish, way. It reenforced my conviction that however tough a situation may be, an adult must face problems calmly and tenaciously. To run away and hide never solves a thing.
Good work, Claudia. The only thing I would call an error is "a series of chaos". It makes no sense. You could say "a series of chaotic events".
I used "following" as a preposition, not a noun, adjective, or adverb as present participles are normally used. In this case, "following" means the same as "after".