Overview
Writing a good rubric from scratch is time-consuming. The AI Rubric Generator takes your assignment title, optional description, board, grade, subject, and chapter, and returns a complete multi-criteria rubric with four performance bands in under 10 seconds.
The rubric is grounded in the selected curriculum chapter: criteria names, descriptors, and mark allocations reflect what students are actually expected to know for that topic rather than being generic.
How it works
- You fill in the assignment details (title, description, total marks, board, grade, subject, chapter).
- The platform queries the hybrid retrieval system — combining vector similarity and full-text search — to pull the most relevant curriculum chunks for that chapter from the knowledge pool.
- GPT-4o-mini receives the curriculum chunks as a reference block and writes a rubric with criteria, mark ranges, and four-band descriptors (Excellent / Good / Satisfactory / Needs Improvement) tailored to the assignment.
Unlike the AI Quiz Generator, the Rubric Generator does not trigger a pool auto-ingest — it works with whatever is already indexed. If the chapter has no content in the pool the AI still generates a rubric, but criteria will be more generic.
Step-by-step
- Go to Dashboard → AI Tools → AI Rubric Generator.
- Enter the Assignment Title (required). This is the main signal the AI uses to decide which skills to evaluate.
- Select Board → Grade → Subject → Chapter from the cascading dropdowns. Each selection narrows the next dropdown to valid options. Chapter is optional but strongly recommended for curriculum-grounded criteria.
- Enter the Total Marks for the assignment (default 100). The AI distributes marks across criteria proportionally.
- Optionally paste a Description of the task (what students must do, what skills are assessed). The more detail you provide here, the more specific the criteria will be.
- Click Generate Rubric. The rubric appears in seconds.
- Review the criteria and descriptors. If you want a different angle, click Generate again — each run produces a fresh rubric.
- Optionally attach to an assignment (see below) or copy as text.
Anatomy of a rubric
A generated rubric contains:
| Field | Description |
|---|---|
| Title | Automatically matches your assignment title |
| Total marks | Sum of all criterion maxMarks — equals what you entered |
| Criteria | 3–6 skill areas (e.g. “Conceptual Understanding”, “Application”) |
| maxMarks per criterion | Marks allocated to that criterion |
| Excellent descriptor | What earns full marks for this criterion |
| Good descriptor | Solid performance with minor gaps |
| Satisfactory descriptor | Basic requirement met |
| Needs Improvement descriptor | Significant gaps; limited understanding demonstrated |
Curriculum grounding
When you select a chapter the system retrieves the top-6 most relevant passages from the knowledge pool using hybrid retrieval — a combination of vector (semantic) similarity and BM25 (keyword) search fused via Reciprocal Rank Fusion. This means criteria like “ability to explain osmosis using the concept of water potential” appear instead of a generic “understanding of the topic”.
If no chapter content is in the pool the rubric is still generated — criteria will be drawn from the assignment title and description instead.
Attaching to an assignment
After generation, an Attach to Assignment dropdown appears. Select any of your existing assignments and click Attach. This saves the rubric to that assignment record so:
- The AI grading system uses it when you run AI evaluation on student submissions.
- Students can see the rubric before submitting (if you have the “Show rubric to students” option enabled on the assignment).
Tips for good rubrics
- Write a description. Even two sentences about what students must do (e.g. “Write a 500-word essay explaining the water cycle with labelled diagram”) produces far more specific criteria than the title alone.
- Set a realistic total marks value. A 10-mark quiz and a 100-mark project warrant very different mark distributions.
- Always pick the chapter when the assignment tests a specific topic. Generic assignments (“half-yearly exam”) work fine without a chapter.
- Regenerate if criteria feel off. Different runs emphasise different skills. Two or three regenerations usually yield a rubric you can use with minimal editing.
Limitations
- Rubrics are generated in English only.
- The AI does not know how many students will submit or how long the assignment is — provide that context in the description for better mark distribution.
- Rubrics are a starting point. Always review descriptors before attaching to a high-stakes assignment.
- Rubric generation does not trigger auto-ingest of chapter content — it uses whatever is already in the pool. For best results, run the AI Quiz Generator for the same chapter first to seed the pool.