If your school has a newspaper, you can take pictures for it, write for it, or help organize it visually. Also key club is super common, it helps you get volunteering hours and looks GREAT on a resume. Also, if there’s a school play or musical, you could do something in house, which means you’d be in charge of the background music, microphones, lights, sound effects, etc. This might change depending on what your school’s play/musical is. Hope this helped!
not exactly impressive (depends on how you define it), but practice sports and join sports teams. you can also volunteer at your local library if they have volunteering opportunities.
My school doesn't offer anything like clubs etc but maybe I could start a campaign and my country doesn't allow minors outside alone or volunteering/working.
To accurately answer the question of what you can actually do, I would need to know what your school offers and what your strengths are.
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