In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: Marsha was teaching a class for the first time one day. Sentence2: She was nervous about what the students would think of her. Sentence3: When she was in class, she tried to be both funny and informative. Sentence4: The students were very engaged through the whole class. Sentence5: This gave Marsha the confidence to continue being a great teacher.
Students, Marsha, Teacher