Formal:
* Versatile: This emphasizes the student's ability to succeed in many different areas.
* Well-rounded: This highlights the student's broad range of knowledge and skills.
* Multifaceted: This focuses on the student's many different talents and abilities.
* Polymath: This term is reserved for someone with exceptional knowledge in many subjects.
Informal:
* Ace: This is a common slang term for someone who is excellent at something.
* Brainiac: This implies a high level of intelligence, but can sometimes be used in a slightly derogatory way.
* Genius: This is a more formal term for someone with exceptional intellectual ability.
* All-rounder: This emphasizes the student's ability to succeed in all subjects.
Ultimately, the best word to use will depend on the specific context and the tone you want to convey.