Which poem from school stuck with you, and why?

[Attention Griffin]

For many people, school is the only time they ever studied poetry properly. Some came away loving it, while others were put off for life by having to analyse every line for an exam. But most of us remember at least one poem that stuck, for good reasons or bad. Sometimes a line comes back to you decades later at the strangest moments

I would love to hear which poem stuck with you. It might be a war poem by Wilfred Owen, something by Shakespeare, a Robert Frost poem, a children's verse from primary school or a poem from an exam anthology. Please just name the poem and poet rather than posting the text, and tell us why it stayed with you

For me, it was Dulce et Decorum Est by Wilfred Owen. We studied it when I was about fifteen, and the description of a gas attack shocked our whole class into silence. It changed how I thought about history lessons and war memorials. I still think about it every Remembrance Sunday. Teachers made a huge difference to how we felt about poems

Some poems stick because a great teacher brought them to life. Others stick because they were forced on us so often that we could never forget them. Both kinds of memories are welcome here

Which poem from school stuck with you, and what made it memorable?