60-second CSV roster
Teachers start with a simple Name, Email, Roll Number template instead of SSO, vendor setup, or manual seat entry.
School demo path for CBSE Class XII Chemistry teachers
Step-by-Step Board Exam Marking Guide & Classroom Repair Map
Turn classroom homework into a repair map in one teaching week.
PrepAI gives teachers a compact classroom loop: 60-second CSV roster, heatmap, assignment dispatch, misconception clusters, and demo mode over the same board-aware Chemistry graph students use for daily retrieval.
This public teacher path is a safe demo surface. Demo mode uses fake classroom data, and no real school adoption is claimed on this page unless customer evidence is verified later.
Demo mode classroom
Fake Class XII Chemistry cohort
Fake/demo data
Roster import
38
sample students
Assignments
4
demo drafts
Cluster alert
2
reteach targets
ChapterOutcomeMasteryMisconception cluster
SolutionsMolarity to molality68%Unit confusion
ElectrochemistryNernst equation42%Sign and log error
KineticsFirst-order half-life74%Formula recall
CoordinationStrong-field spin39%Ligand field inversion
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 classroom loop teachers can actually run
The school path is built for low setup friction and high trust: CSV first, approved questions only, visible heatmaps, and repair work tied back to the student learning OS.
Heatmap by outcome
Class progress rolls up by chapter, topic, learning outcome, and weak prerequisite so reteach time is focused.
Assignment dispatch
Teachers choose chapter, outcome, difficulty, and count, then preview approved questions before publishing.
Misconception clusters
Repeated wrong options become class-level repair signals instead of isolated marks in a spreadsheet.
Demo mode
The school demo uses fake classroom data and marked sample cohorts until real school evidence is verified.
Assignment dispatch without question-bank chaos
Teachers should not publish random worksheets. PrepAI turns a classroom gap into a reviewed, outcome-tagged assignment with a preview gate before dispatch.
1
Select Class XII Chemistry chapter and outcome.
2
Set question count, marks, difficulty, and time budget.
3
Preview stems, outcome tags, KaTeX, and review status.
4
Dispatch only approved items to the classroom dashboard.
Independent Tutor & Coaching Batch Workbench
Batch Misconception Heatmap & 1-Click Corrective Worksheet Compiler
Sample class, not real data
Inspect 5-chapter x 4-error-type vulnerability clusters across CBSE Class XII Chemistry Part 1 and compile a targeted 5-question corrective worksheet with masked student handouts and 3-step fractional marking keys.
Tue / Thu / Sat evening board numericals and derivation drill · Weakest outcome auto-selected: CBSE-12-CHEM-CH2 (LO-ELE-04)
Worksheet Output Mode
5-Chapter x 4-Error-Type Vulnerability Matrix (Click row to target worksheet)
24 students in batch
| Chapter | Conceptual | Formula | Sign/Unit | Reading | Avg FSRS-5 Stability | Top Missed Prerequisite | Action |
|---|---|---|---|---|---|---|---|
| CBSE-12-CHEM-CH1Solutions | 9 | 7 | 14 | 4 | 4.2d | LO-SOL-07 Van't Hoff factor dissociation and molality unit conversion | |
| CBSE-12-CHEM-CH2Electrochemistry | 11 | 12 | 19 | 6 | 2.8d | LO-ELE-04 Nernst equation log Q sign and electron transfer count n | |
| CBSE-12-CHEM-CH3Chemical Kinetics | 6 | 11 | 8 | 5 | 5.1d | LO-KIN-03 First-order integrated rate law and time-unit consistency | |
| CBSE-12-CHEM-CH4d- and f-Block Elements | 13 | 4 | 3 | 7 | 5.6d | LO-DF-02 Lanthanoid contraction and Cr / Cu 3d subshell exchange stability | |
| CBSE-12-CHEM-CH5Coordination Compounds | 16 | 6 | 5 | 8 | 3.9d | LO-COORD-07 Strong-field vs weak-field d-orbital splitting and pairing energy |
Student Masked Handout
CBSE-12-CHEM-CH2 · LO-ELE-04
5 Questions · 13 Marks
Targeted Repair: Electrochemistry (Nernst equation log Q sign and electron transfer count n)
Dominant batch error cluster: Sign/Unit · Batch avg FSRS-5 stability: 2.8 days · NCERT coordinate: NCERT Part 1 > Ch 2 Electrochemistry > Sec 2.3 Nernst Equation
Student Masked Handout: answer keys and numerical solutions are withheld until commit-before-reveal submission.
Q1 · LO-ELE-04 (Sign/Unit Repair)
3 Marks
Calculate the EMF of the cell Zn(s) | Zn2+(0.10 M) || Cu2+(0.010 M) | Cu(s) at 298 K given E0(Zn2+/Zn) = -0.76 V and E0(Cu2+/Cu) = +0.34 V.
Commit-Before-Reveal Blank: E0_cell = [___] V | n = [___] | Q = [Zn2+]/[Cu2+] = [___] | E_cell = [___] V
Unit & Sign Checklist: Use E0_cell = E0_cathode - E0_anode = +1.10 V · Set Q = 0.10 / 0.010 = 10 · Report E_cell in VNCERT Part 1 > Ch 2 > Sec 2.3 Nernst Equation
Q2 · LO-ELE-04 (Formula Repair)
3 Marks
The conductivity of 0.020 M KCl solution at 298 K is 0.00248 S cm^-1. Calculate its molar conductivity (Lambda_m) in S cm^2 mol^-1.
Commit-Before-Reveal Blank: Formula Lambda_m = [___] | kappa = [___] S cm^-1 | C = [___] M | Lambda_m = [___] S cm^2 mol^-1
Unit & Sign Checklist: Use factor 1000 cm^3 L^-1 in numerator · Express final unit as S cm^2 mol^-1NCERT Part 1 > Ch 2 > Sec 2.4.2 Variation of Conductivity and Molar Conductivity
Q3 · LO-ELE-04 (Sign/Unit Repair)
3 Marks
Calculate the standard Gibbs energy change (Delta_r G0) in kJ mol^-1 for the reaction Zn(s) + Cu2+(aq) -> Zn2+(aq) + Cu(s) given E0_cell = +1.10 V and F = 96487 C mol^-1.
Commit-Before-Reveal Blank: Formula Delta_r G0 = [___] | n = [___] | Delta_r G0 in J mol^-1 = [___] | in kJ mol^-1 = [___]
Unit & Sign Checklist: Retain negative sign in Delta_r G0 = -n F E0_cell · Divide J mol^-1 by 1000 to report kJ mol^-1NCERT Part 1 > Ch 2 > Sec 2.3.2 Electrochemical Cell and Gibbs Energy
Q4 · LO-ELE-04 (Conceptual Repair)
2 Marks
Why does the conductivity (kappa) of an electrolytic solution decrease on dilution whereas its molar conductivity (Lambda_m) increases?
Commit-Before-Reveal Blank: On dilution: ions per unit volume [increases / decreases] -> kappa [___] | total volume containing 1 mol electrolyte [___] -> Lambda_m [___]
Unit & Sign Checklist: Distinguish per-cm^3 ion density (kappa) from 1-mole total volume (Lambda_m)NCERT Part 1 > Ch 2 > Sec 2.4.2 Variation with Concentration
Q5 · LO-ELE-04 (Reading Repair)
2 Marks
Compute the charge in Coulombs and Faradays required to reduce 1 mole of MnO4^- ions to Mn^2+ in acidic medium.
Commit-Before-Reveal Blank: Oxidation state of Mn in MnO4^- = [___] | Final state = +2 | Electrons per ion n = [___] | Charge = [___] F = [___] C
Unit & Sign Checklist: Check Mn oxidation change (+7 to +2 -> 5 e^-) · Multiply 5 F by 96500 C mol^-1NCERT Part 1 > Ch 2 > Sec 2.5.1 Quantitative Aspects of Electrolysis
Batch-level misconception aggregation only: students are compared against the CBSE Class XII Chemistry syllabus and their own repair history, never ranked against peers.
Aligned to the CBSE Class XII Chemistry syllabus. Not affiliated with or endorsed by CBSE.
Teacher trust boundaries
Demo mode uses fake classroom data.
No real school adoption is claimed on this page.
CSV roster is the launch workflow; SSO stays parked.
Payment and provider state remain UNKNOWN until verified.
What the demo proves
The demo proves the product shape teachers care about: roster speed, heatmap readability, assignment preview, misconception repair, and safe data boundaries. It does not claim live school rollout, school partnership, or verified institutional revenue.