A university offer that reads "conditional on achieving 38 points" is built on a number a school submits months before the actual IB exams happen — the predicted grade. Students sometimes treat mocks as low-stakes practice, not realizing that mock exam performance is usually the single biggest input a school uses to set that number, which real universities then use to make real admission decisions.

How schools actually arrive at a predicted grade

Teachers set predicted grades using a mix of coursework, classroom performance, and — most heavily — mock exam results, since mocks are the closest available approximation to how a student will actually perform on the real IB papers. A student who has a strong reputation in class but underperforms on mocks often finds their predicted grade reflects the mock result more than the classroom impression, because it's the more objective, exam-condition data point available.

Why this makes mock exam quality, not just effort, matter

  • A mock exam that isn't marked against genuine IB criteria can give a falsely reassuring or falsely alarming result, which then feeds directly into a predicted grade that a university offer depends on.
  • A single mock sitting is a thinner basis for prediction than several sittings across the year, since one paper can be affected by an off day in a way a trend across multiple papers isn't.
  • Students sometimes under-prepare for mocks specifically, assuming they're lower-stakes than the real exam — when in the university-application timeline, they can matter just as much.

What this means for how mock exams should actually be treated

Given how directly mock results feed into a number that real universities act on, a mock series worth trusting needs genuinely rigorous, criterion-based marking — not a lighter, lower-stakes version of the real exam. Preparing seriously for mocks isn't just practice for May; for many students, it's the actual data that determines what offer they can accept.

What this looks like in practice

BuzzyBrains Academy's IB Test Series marks every mock paper against the same criterion-based grade descriptors real IB examiners use, across multiple sittings through the year, so a student's predicted-grade trend is built on genuinely rigorous data rather than a single lighter practice run.

If a university offer is riding on your child's predicted grade, the IB Test Series page has the full mock series schedule — worth treating each sitting with the seriousness its actual downstream effect deserves.