Barry talked with Walt after class about his failing test scores. He made excuses and tried to get Walt to let it slide and pass him or else he would have to go to summer school. "Don't bullshit a bullshitter" was Walt's response. He later failed the retest by an even greater margin ("Negro y Azul").
Following the Wayfarer 515 crash in a school assembly, Barry spoke about how he felt about the incident. He attempted to exploit the disaster by unsubtly trying to convince the school to give students preferential grades, claiming that many colleges give roommates of people who commit suicide an "automatic A" ("No Más").
Barry is an underachieving student whose ineptitude for putting sound effort into his academics is made apparent. He attempts to seize opportunities to attain preferable grades in both of his appearances in the show, paying no mind to how he's already been perceived as undeserving of any leniency and being insensitive, respectively.