International Baccalaureate 2020 calculated grades algorithm lowers student scores
After canceling May 2020 exams due to COVID-19, the International Baccalaureate Organization used an opaque algorithm to calculate final grades. This resulted in unexpectedly low scores for many students, threatening their university admissions and scholarships.
The IBO used an opaque grading algorithm that produced unexpectedly low scores, leaving students' futures to a black box.
Key facts
- What
- After canceling May 2020 exams due to COVID-19, the International Baccalaureate Organization used an opaque algorithm to calculate final grades.
- Incident date
- Jul 6, 2020
- Who
- International Baccalaureate Organization
- Failure mode
- Brand & Safety Incident
- AI surface
- Algorithmic Decision
- Severity
- High
What happened
The International Baccalaureate Organization cancelled its May 2020 final exams and used an automated system to calculate student grades. On July 6, 2020, results for over 174,000 students were published. Many students received scores lower than their predicted grades, causing widespread panic and risking university admissions.
What broke inside the model
- 01 · TriggerA user prompts the model in public view.
- 02 · Model stepThe model produces unsafe or off-brand output.
- 03 · Control gapNo filter holds the line before publish.
- 04 · FailureThe output goes public unchecked.
- 05 · ConsequenceA reputational or safety incident lands.
A contained signal crosses into output that goes public.
The system used an undisclosed algorithm to combine predicted grades and internal assessments. This lack of transparency created a black box where students could not verify why their final grades were lowered.
What it cost
Sources
- PressAlgorithm used for IB scores this year blamed for students' low marksinsidehighered.com
- PressIB Betrayal: How the IBO Failed Its Students in 2020global-geneva.com
- PrimaryCOVID-19 AND THE INTERNATIONAL BACCALAUREATEtandfonline.com
Cite this entry
https://failureindex.ai/failures/international-baccalaureate-2020-calculated-grades-algoAI Failure Index. "International Baccalaureate 2020 calculated grades algorithm lowers student scores" (FI-0599). Realm Labs. https://failureindex.ai/failures/international-baccalaureate-2020-calculated-grades-algo (indexed Jun 22, 2026).Data fields CC-BY 4.0, prose citation permitted. Incident ID FI-0599. Full dataset at /data.
Note from Realm Labs, the Index steward
How Realm would have caught this
- Prism
- OmniGuard
- AI Detection & Response (AIDR)
Realm watches the model's internal state for the signature of unsafe or off-brand generation and can block or reroute the output before it becomes public, in real time rather than after it has been screenshotted.