---
license: cc-by-nc-4.0
language:
- zh
task_categories:
- question-answering
tags:
- knowledge-tracing
- mathematics
- multimodal
---

# SketchKT

SketchKT is a de-identified Chinese mathematics dataset for multimodal
knowledge-tracing research. It has two data-table directories and two shared
scratch-image libraries. Images are stored once only. Temporal KT stores its
large image library in `tar.gz` shards. Extract the shards at the dataset root
to create `scratch_images/`; every existing `scratch_image` value then works
as an ordinary relative path. Progress Verified KT uses ordinary relative
image paths without extraction.

| Component | Contents |
| --- | --- |
| `Temporal KT/` | 10,000 selected student sequence windows, 423,712 deduplicated interactions, questions, knowledge components, and train/validation/test splits. Each sequence contains 80 historical interactions and one target interaction. |
| `Progress Verified KT/` | A 1,031-row labeled test set: 841 correct and 190 incorrect. Each row has exactly `reference_answer`, `question_text`, `scratch_image`, `student_answer`, and `is_correct`. |
| `scratch_archives/` | Shared `tar.gz` drawings used by Temporal KT, plus an archive manifest. |
| `pvkt_scratch_images/` | Shared masked drawings used by Progress Verified KT. |

## Privacy and responsible use

This release removes source identifiers, absolute dates, source URLs, and
demographic/geographic fields. Public image names are newly assigned and every
released image is checked for embedded EXIF metadata. Structured personal-data
patterns in released text are conservatively redacted. The image pixels are
not altered beyond the pre-existing Progress Verified KT answer masking.

No automated check can establish that handwriting has no identifying content
in every image. Users must follow `DATA_USAGE.md`, avoid re-identification,
and report suspected personal information to the maintainers rather than
redistributing it.

## License

This dataset is made available under [CC BY-NC 4.0](LICENSE). The additional
data-use terms in `DATA_USAGE.md`, including the prohibition on
re-identification, apply to access and use of this release.

See `SCHEMA.md` for the table fields and image-reference format.