NTLSN · For institutions & schools

Calibration Suite

The fairest thing you can do for students is make sure a 72 from one marker is a 72 from every marker. The Calibration Suite runs a simple ritual before marking starts: everyone scores the same sample, you see the spread, and you talk until it closes. Try the live spread checker below.

The calibration ritual

01 · SAMPLE

Pick a shared script

Choose 2–3 anonymised student samples that span the grade range.

02 · SCORE BLIND

Everyone marks alone

Each marker scores the same sample independently against the rubric — no conferring yet.

03 · SEE THE SPREAD

Reveal together

Plot every marker's score. The gap between highest and lowest is the number that matters.

04 · CLOSE THE GAP

Talk & align

Discuss the outliers, agree what the rubric means, re-mark. Repeat until tight.

Live spread checker

Score the sample

Enter each marker's score for one shared sample (0–100). Watch the spread. Nothing is saved — it clears when you close the tab.

Spread (max − min)

Mean

Std dev

Enter scores

Why calibrate?

Fairness you can defend

If a grade appeal lands, "we calibrated before marking" is the answer moderators want to hear.

Rubrics that actually mean something

The disagreements surface exactly which criteria are read differently — then you fix the wording.

Sessional onboarding, fast

New and casual markers get inside the standard in one session instead of a semester.

Evidence for recognition

Leading calibration is assessment leadership — strong SFHEA and award evidence.

Run calibration across your school

Facilitated calibration workshops, rubric clinics and a moderation record — part of the School & Enterprise packages, or standalone.

Book a calibration →