General terms:
* Quick learner: This is a common and straightforward way to describe someone who picks things up easily.
* Sharp: This implies intelligence and a keen mind.
* Bright: Similar to "sharp", it suggests intelligence and a quick grasp of concepts.
* Astute: This emphasizes the ability to perceive and understand things accurately and clearly.
More specific terms:
* Perceptive: This highlights the ability to notice and understand subtle things.
* Insightful: This implies a deep understanding and the ability to see beyond the surface.
* Intuitive: This suggests an instinctive understanding, as if they "just know" things.
* Gifted: This indicates exceptional natural ability.
* Prodigy: This refers to someone with exceptional talent at a young age.
Informal terms:
* Catch on fast: This is a casual way to say someone learns quickly.
* Pick it up in a flash: This implies very fast learning.
* Got it in a heartbeat: This suggests effortless understanding.
The best term to use will depend on the specific context and the impression you want to make.