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Fission

A huge time-saver for moderation — rank, stretch, and lock grades with professional judgment. Under Teacher only; not a Lab create app.

All guidesSign in and pick a class to open Fission

What Fission is for

Fission is a huge time-saver for moderation. You keep relative order and professional judgment, while the continuum and stretch tools turn a stack of scripts into a defensible ranked set far faster than re-marking by hand.

Fission task with score continuum, stretch controller, and rankings — Fission — score continuum, stretch controller, and student rankings· click to enlarge

Open Fission from Teacher only in the sidebar. You work a task (for example a written response) on a score continuum: place students relatively, then use the stretch controller to set bounds and knots so letter grades and finals reflect your standards. Rankings update as you adjust — without starting again from a blank spreadsheet.

Score continuum — visual placement of students across grade bands (e.g. C / B / A)
Stretch controller — click to add interior knots; double-click to remove; set bounds for the ranked set
Student rankings — combined or aspect scores, letter grade, final score; lock when ready
Equal distribution / Fine grain / Reset — tools to reshape the spread without losing relative order
Edit grade descriptors — align band language with your assessment

Why moderation is faster

Traditional moderation often means re-reading, re-totaling, and arguing about cut-offs late at night. Fission keeps the hard part — your sense of who is stronger than whom — and automates the tedious part: mapping that order onto marks, bands, and finals as you stretch or fine-grain the scale.

Equal distribution and fine grain let you explore fair spreads without losing relative rank. Reset and lock give you a clean path from draft judgment to a settled result you can stand behind with colleagues or parents.

Judgment stays yours. Fission saves the hours spent recalculating and reshuffling so moderation meetings can focus on standards, not arithmetic.

Vs Lab and Sentinel

Tool	Job
Lab	Create student learning activities
Fission	Mark and moderate student work with continuum judgment — fast
Sentinel	Learning support, pastoral care, behaviour, and accommodation records (staff documentation)

Spark and Flux gradebooks hold task scores and coaching history. Fission is where you moderate and stretch a cohort’s ranked results into defensible finals.

How you use it

Teacher only → Fission (or open a Fission task from the class).
Select the assessment / response set you are moderating.
Order students on the continuum; adjust stretch knots and bounds.
Review rankings and letter grades; edit descriptors if needed.
Lock when the set is ready for reporting.