You asked the right guy. I recently experienced this awful problem. It helps you be more aware of your surroundings.
Answer:
In 1974, Escalante took a job at Garfield High School in East Los Angeles, California. He found himself in a challenging situation: teaching math to troubled students in a rundown school known for violence and drugs. While some had dismissed the students as "unteachable," Escalante strove to reach his students and to get them to live up to their potential. He started an advanced mathematics program with a handful of students. His voice to fight for the troubled helped others to strve for the troubled.
Explanation:
Parallel structure means using the same pattern of words to show that at least two ideas are equally important as each other. Parallel structure can be used to create a rythem or a pattern in certain types of sentences.