* Formal: "The valedictorian delivered a moving speech about the importance of perseverance and pursuing one's dreams."
* Informal: "My sister is such a hard worker, I bet she'll be valedictorian!"
* Descriptive: "As valedictorian, Sarah represented the academic excellence of her graduating class."
* Humorous: "Even though I wasn't valedictorian, I still got a standing ovation for my rendition of the school song."
Let me know if you want me to write a sentence with a specific tone or focus!