About CAS Shield
CAS Shield is Casta's AI-guided platform for UK university CAS interview preparation. Every lesson, mock interview, and piece of feedback adapts to how you actually learn — so you walk into your student visa interview ready.
Your prep journey
Learn at your own pace
Our AI builds a lesson plan around your course, university, and personal background, then walks you through the questions a CAS interviewer is likely to ask before you attempt a single one yourself.
Practice, question by question
Answer real CAS interview questions on camera while our AI reviews your response alongside your video — tracking eye contact, face movement, and voice, and flagging if more than one person is present in the room. You get a clear breakdown of what went wrong and how to answer better.
Sit the full mock interview, get real feedback
Go through a complete mock CAS interview and receive the same detailed AI feedback as practice. After your 8th attempt, a Casta counsellor personally reviews your results and coaches you one-on-one before the real thing.