Self-serving bias refers to the propensity to associate adverse circumstances with external causes, whereas favorable events are the cause of personal credit. In other words, people attribute success to personal qualities, while they blame outside sources for their failures. As a result, in "The Breakfast Club," Vernon cannot accept his wrongdoing as a principal and holds the children responsible for being arrogant and misbehaving.
have you tried looking the word up in the Dictionary? if that doesnt help much, you can guesstimate the word by searching it in the thesaurus! it will give you synonyms of the word.
I am not going to write a whole paper for you but maybe you could write the opsing side on how they disrupte class ect. If you need any help or ideas you can ask