Generic AI guesses at grades. iBMarker is calibrated criterion-by-criterion against official IB assessment rubrics - so every score, every comment, and every level descriptor speaks the language your moderators expect.
The difference between a useful AI marker and a misleading one isn't model size - it's whether the grader speaks IB.
Every IB rubric splits an answer into discrete criteria with explicit mark bands. iBMarker scores each one independently - just as a moderator would.
IB command terms dictate the depth expected - iBMarker parses the term on every question and grades to the matching rubric bands.
Each subject's marker is trained on thousands of teacher-marked exemplars from across the network, then validated against held-out moderator scores.
Most “IB-aligned” AI tools just paste the rubric into a prompt and hope. iBMarker is grounded in the actual IB subject guides.
Full criterion-level AI marking is live for the subjects below. Assignment distribution, gradebook, and analytics work for any IB subject - even those still in the marker queue.
Not live yet - tell us your subject and we'll prioritise it.
Onboard your IB department in minutes. Full marker, gradebook, gaming layer, and analytics - free for Institutions, teachers, and students.