One prompt could be 'You find a magic key. Where does it lead you?'. For this, a student could write about finding the key in their backyard. They might say the key leads them to a secret garden full of talking animals and magical plants. It's a place where they can have adventures and make new friends.
A prompt like 'You discover a hidden door in your school library' would be great. The student could start by saying they were looking for a book when they noticed a strange crack in the wall. Pushing on it, a door opened. Inside, there were old books that told stories of the school's past and a friendly ghost who was the librarian long ago. They could have a conversation with the ghost and learn about the old days of the school.
You can start by making a timeline of the major events in your life. For example, your birth, first day of school, big moves, and so on. This gives you a framework to build on.
Definitely include major achievements like graduating from school, getting a promotion at work, or winning an award. These show your growth and progress in life.
You can look for inspiration in your daily life. Observe people, events, and emotions around you. Also, reading a wide variety of books and articles can spark ideas.
Another way is to read a variety of books and articles. Different genres and styles can trigger your creativity and give you ideas for story prompts. For example, a mystery novel might inspire you to come up with a similar plot twist for your own story.