It's frowned upon to get an F on an assignment.
Ginny has a big test at school tomorrow that she hasn't studied for yet, but she wants to go out to play.
Ginny wants show up for the exam.
Ginny decides to have a cram study session instead of playing, then takes the test.
Ginny decides to not go over her notes and plays outside instead, and then takes the test.
Ginny gets a passing grade and learns next time to study earlier.
Ginny ends up failing the exam and regrets not studying.