1) The document discusses a student's perceptions of one of their high school teachers based on how he dressed and his wife's attire, believing him to be very pious and religious.
2) However, the truth was different - outside of school the teacher wore casual clothes and would flirt with young girls at his tuition center.
3) The document also discusses how the student and friends would perform better in tennis when alone, but their performance would worsen when other students watched or teachers made negative comments, a phenomenon known as social loafing.