Step 1
Register the source
Each official reference receives authority, URL, source kind, locator type, hash status when local assets are reviewed, and a reuse boundary.
Source-safe, review-gated, coordinate-first
How PrepAI turns official sources into reviewed Chemistry practice.
PrepAI uses official NCERT and CBSE sources to anchor structure, coordinates, paper patterns, and review evidence. Student-facing questions are original variants that pass source, answer, rubric, KaTeX, and review-state checks before they can enter practice.
Official source inputs
NCERT textbook portal
Used as a structure authority for chapter, topic, page, and section locators. PrepAI stores coordinates and review evidence, not copied textbook passages.
CBSE question-paper portal
Used to study paper format, section behavior, marks distribution, and board-style patterns for approved practice and mock compilation.
Official source does not mean official partnership. PrepAI does not claim CBSE or NCERT endorsement on this page.
Trust constraints
PrepAI shows how the study loop is constrained before asking for trust.
Source-safe
Official sources guide structure and coordinates; PrepAI content stays coordinate-based.
Deterministic tools
Chemistry calculators and paper compilation use local rules, not runtime AI guesses.
Answer-masked
Answers, explanations, and rubrics stay locked until the student commits a response.
Review-gated
Questions must pass content review before DPP, practice, assignment, or mock use.
Secure rendering
Formula rendering uses KaTeX with trust:false and unsafe math commands blocked.
The source-to-practice pipeline
The methodology is designed to keep official material as locator evidence while protecting PrepAI from copied passages, answer leakage, unsafe formula rendering, and unreviewed drafts.
Step 2
Create the locator
Curriculum outcomes point to coordinate-only metadata such as chapter, page, section, paper year, subject, set, and question number.
Step 3
Draft original variants
Question stems, options, explanations, and rubrics are written as original PrepAI variants aligned to the outcome and misconception tag.
Step 4
Check math rendering
KaTeX content is checked with trust:false rules and unsafe script-like commands blocked before review approval.
Step 5
Review before exposure
Drafts move through DRAFT, QA_REVIEW, APPROVED, BLOCKED, and ARCHIVED states. Only APPROVED items can reach students.
Step 6
Mask answer material
Answer, explanation, rubric, and solution-revealing context remain outside the initial practice payload until the student commits.
What reviewers inspect
Content review is a product surface, not a hidden note. Each item should expose enough evidence for admins to approve, block, archive, or send it back without a code deploy.
Outcome code and topic path
Source locator and license/reuse state
Generated-original flag
Stem, options, answer, explanation, and rubric
Difficulty, marks, estimated seconds, and section type
Misconception tags for wrong options
KaTeX parse and sanitizer status
Reviewer decision and rollback status
Coordinate-only source proof
A PrepAI question can point to a source locator such as a chapter, section, page, paper year, set, or question number. That locator helps reviewers and parents understand where the concept belongs without placing textbook text or full paper text into the product page.
Example locator shape
- Subject
- CBSE Class XII Chemistry
- Locator
- Chapter, section, page, outcome
- Question origin
- Generated-original variant
- Review state
- DRAFT -> QA_REVIEW -> APPROVED
Claim ceiling
No official CBSE or NCERT partnership claim.
No copied textbook passages in public methodology copy.
No claim that every content item is already approved.
No guaranteed score improvement or 100 percent accuracy claim.
No live payment, school adoption, RLS, or provider-readiness claim.
Use the same methodology in practice.
Public tools teach the method. Review-gated practice checks whether the student can retrieve it.