K12 Dataset Overview

• Approx. 60 million high-quality K-12 records.

• Delivered in plain-text JSON format (sample available).

• Two separate corpora: 25 million Chinese records and 29 million English records—zero overlap.

• Chinese data are sourced from schools in Mainland China, Hong Kong and other Chinese-speaking regions; English data come from the United States, United Kingdom, Canada and other English-speaking regions.

• Each record includes: ID, question, (some with full prompt), answer, explanation, subject, grade level, difficulty. All formulae are rendered in paired LaTeX “$…$”.

• Covers every core K-12 subject—Chinese, Mathematics, English, Science, Physics, Chemistry, Biology, History, Geography, Civics, etc.

• Available as separate Chinese or English datasets, or as a combined bilingual set for multilingual model training. Purchase both together and receive a 20 % discount.  

Purchase Options

English Version — 29 million records (no overlap with Chinese edition)

Chinese Version — 25 million records (no overlap with English edition)

Bilingual Version (Chinese + English) — 60 million records (20 % bundle discount)

Data Details

Aspect Description

Volume ~60 million education records—ample scale for deep-learning model training.

Languages Chinese and English versions can be used independently or jointly for cross-lingual enrichment.

Subject Coverage Full K-12 curriculum across all major disciplines.

Hierarchical Structure Clearly layered taxonomy by grade, subject, question type and difficulty—highly structured for targeted filtering.

Formats Provided in JSON (and optional CSV); each entry contains ID, question, (prompt), answer, explanation, subject, grade, difficulty, etc.

Compliance Legitimate, rigorously screened sources—content is reliable and free of copyright disputes; safe for commercial or research use.

Extensibility Custom subsets or subject-specific augmentations available to match project requirements.

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