Anyone who has sat in an exam hall knows the room is never truly silent, and "Exam" begins with that discovery. "The scrach of pens on paper / The russle of a turning page": all the noise comes from other people working. The p sounds in "pens," "paper" and "page" tap like fingertips on a desk, and the soft hiss of "russle" is the sound of someone else reaching the next page before you do. The spelling slips ("scrach," "russle," later "Rembering") look like accidents rather than design, but the sounds survive them. The speaker's attention is hostage to tiny noises, which hints that this is a poem about nerves and time rather than about knowledge.
Time is the real subject, and the poem's structure is built to make us feel it. Three blocks of text each end with the same refrain: "When will it be over / over / over." The question has no question mark, so it reads less as a real enquiry than as a chant, something the mind repeats because it has nothing else to do. Breaking "over" onto separate lines makes the word dwindle down the page like an echo, or like minutes dropping one at a time. There is no conventional rhyme here, but "over" rhymes with itself, and a word that only matches itself is going nowhere. That is exactly the feeling of watching a clock. The poem is free verse, with short lines and almost no punctuation, so thoughts arrive unfiltered and unfinished.
What comes before each refrain shows a mind moving through stages. The first block is pure sensation. The second turns to instruction and panic: "Keep your head down" followed by the blunt, unpunctuated "What is the answer to this question." The command could come from an invigilator or from the speaker's own nerves, and the second-person "you" makes it hard to say which. It also pulls the reader into the speaker's seat. "Keep your head down" is a phrase for danger, for soldiers, prisoners and anyone trying not to be noticed. Used here, it casts the exam as something to be survived rather than something to be shown off in.
The third block is the strangest: "Rembering long lost / People, things, lives." It may describe a history paper, with the mind dredging up the dead and their belongings as material for answers. It may equally describe attention drifting from the page to anything else. The poem doesn't decide, and that openness helps it. The list widens as it goes, from "People" to "things" to "lives," until the scale is far larger than a single desk, as if exhaustion has pushed the speaker's thoughts outward. There is quiet irony in the verb, too. Remembering is the task the exam sets, yet here memory is "long lost." The refrain that follows feels the most weary of the three.
Then the pattern breaks. In the final block the refrain simply does not return, and the only quoted speech in the poem arrives: "Pens down." The poem's question is answered by its own form, since the repetition that dragged on stops the moment authority speaks. The phrasing of the last two lines is slightly knotted, with "the last word" for what is really two words, but the sense is clear. It is the final command before release, and the poem ends on "freedom." That word belongs to a vocabulary of confinement that has been building all along, through "keep your head down" and the endless wait. The ending is quiet, with no exclamation mark and no celebration. Freedom arrives as relief and flatness, the feeling of putting something heavy down.
The poem's achievement is that it makes the reader wait. It uses no elaborate metaphor, and its force comes from sound, repetition and a few carefully placed shifts in voice, which turn a familiar school experience into something felt rather than described. A reader who has been in that hall will recognise the scratching pens, the blank moment and the crawl towards the final instruction. A reader who hasn't will still feel how slowly the refrain moves.