Five words, and every one of them is about copying. Contagious means easily spread from person to person, which is how Stargirl’s joy moves through the school. To imitate is to copy the way someone acts or looks, and within weeks the hallways are full of students doing it. A fad is a craze that spreads fast and then fades — being like Stargirl becomes exactly that. To adore is to love and admire greatly, which for a few golden weeks the whole school does. Exuberant means full of lively, overflowing energy, and it describes the crowd as much as the girl. Set the five together and you can see the trap. Nothing here describes anyone deciding anything. That is the warning buried in the golden weeks: a fad has no author, and neither does what happens to her next. The school does not choose Stargirl; what happens to her is closer to a contagion.

This portion of Stargirl links setting to conflict, then measures the human change produced by that collision. For one brief, dazzling stretch, the impossible happens: Mica High falls head over heels in love with Stargirl. Her free spirit turns out to be contagious. Students who used to gawk begin to imitate her; her quirks become fashionable; the whole school seems to loosen, brighten, and dare to be a little strange. It starts, in part, with the basketball team, which catches fire and rips off an electric winning streak, the gym roaring, Stargirl at the glowing center of it all, leading cheers that feel less like routines and more like joy set loose. She is invited everywhere, copied everywhere, adored. The student council even brings her into the fold. This event pattern makes “The School in Love” the section’s central reversal.

Across Chapters 9–13, mood interacts with metaphor and foreshadowing to complicate the apparent meaning of events. Watch the language Spinelli reaches for as Stargirl’s fame grows: the team catches fire, the school burns with a happy fever, enthusiasm spreads like a blaze. These are metaphors — comparisons that call one thing by the name of another to reveal its nature. Fire and fever are perfect choices, because both are thrilling and both are dangerous. A fever burns hot and then breaks; a fire lights up a room but can just as easily rage out of control or die to ash. By describing Stargirl’s popularity in the language of fire, Spinelli quietly warns us what kind of thing it is: bright, fast, contagious — and impossible to keep burning forever. That authorial design makes “A Fire That Spreads” a lesson in deliberate contrast.

Visual AidThe real thing the metaphor borrows

For a few weeks Stargirl is the most popular person at Mica High, and the way that happens tells us something important about crowds. Popularity, psychologists note, comes in two very different kinds. One is being genuinely liked — trusted, kind, good to be around. The other is status: being talked about, watched, imitated, treated as important. The two do not always go together, and status in particular is wildly unstable. A crowd can surge toward a new favorite almost overnight, in a rush that behaves less like friendship than like a fad — a craze that spreads by imitation, where people copy a behavior mainly because others are copying it. This is why Stargirl’s quirks suddenly become fashionable: once a few students imitate her, others imitate the imitators, and difference briefly becomes the new sameness. That last phrase is the whole problem. Mica did not learn to like someone unusual; it found a new thing to copy. So the crowd that adores her has not changed its mind about anything, and can turn without changing it back.