Loona Rubric Maker — Fair, Transparent Marking Grids
A good rubric does three jobs at once: it marks consistently, it shows students exactly what quality looks like before they start, and it ends most "why did I get this mark?" conversations before they begin. The tedious part was always the arithmetic and layout — that part is now automatic.
Level points are calculated as Excellent = 100%, Good = 75%, Fair = 50%, Needs Work = 25% of each criterion's maximum. Every description cell is editable after building — click and type before printing.
How to Use It
- Name your rubric and edit the starter criteria, or delete them and add your own with "+ Add criterion".
- Set each criterion's maximum points by importance — content usually outweighs presentation, so weight it that way.
- Write the four level descriptions for each criterion, separated by | (Excellent | Good | Fair | Needs Work). Describe observable quality, not effort.
- Build, then click any cell in the grid to fine-tune its wording. Points per level (100% / 75% / 50% / 25% of the maximum) are filled in for you.
- Print one per student or project it while marking.
How It Works
The rubric is a criteria × levels grid. Points are derived from each criterion's maximum using fixed level fractions (1.0, 0.75, 0.5, 0.25), rounded to one decimal, and the total is the sum of maxima — shown in the header so students always know the stakes. Descriptions are kept as plain text and rendered into editable cells, so the printed rubric is exactly the grid you approved on screen.
Frequently Asked Questions
Why fixed level fractions (100/75/50/25)?
They keep marking consistent across criteria of different weights, and they make the maths auditable by students. If your school uses different bands, the points are printed per cell — adjust the max points per criterion to land close to your bands, and edit cells before printing.
What makes a good level description?
Observable evidence, not adjectives alone: "three supporting details with examples" beats "good detail". Students should be able to point at their work and say which description it matches.
How many criteria should a rubric have?
Three to six. More than that and neither you nor the student can hold the grid in mind; fewer and the feedback becomes too blunt to act on.