Simplify the following text for a Grade 7 native English-speaking person.
Original: Vonnegut admitted that he was a poor anthropology student , with one professor remarking that some of the students were going to be professional anthropologists and he was not one of them .
Simplified: Vonnegut admitted that he was a not a good student . One professors said that some of the students were going to be professional anthropologists but he was not one of them .