How CBSE Internal Assessment Marks Are Calculated — And Why 500 Schools Got Flagged by AI
Complete guide to CBSE internal assessment marks calculation for Class 10 and 12. How schools assign marks, what AI detected in 500+ schools, and how to ensure your IA marks are fair and accurate.
In short: CBSE internal assessment (IA) marks include practicals, projects, and periodic tests — typically 20-30 marks per subject. In 2024, CBSE used AI tools to detect 500+ schools inflating IA marks artificially. Schools with suspicious patterns (everyone getting 19-20/20) were flagged and asked to justify. This guide explains how IA marks are calculated, what the AI detected, and what it means for students in 2027.
What Are Internal Assessment Marks?
Internal Assessment (IA) marks are school-evaluated components that contribute to your final board exam score.
Component
Evaluated By
Marks (Typical)
Theory exam
CBSE (external)
70-80 marks
Internal Assessment
School (internal)
20-30 marks
Total
Combined
100 marks
IA Components by Subject Type
Subject Type
IA Components
Total IA Marks
Science (with practical)
Practical exam + Viva + Record
30 marks
Science (without practical)
Project + Periodic tests
20 marks
Mathematics
Project + Periodic tests
20 marks
Languages
Speaking + Listening + Project
20 marks
Social Science
Project + Periodic tests
20 marks
How Schools Calculate IA Marks
Practical Subjects (Physics, Chemistry, Biology)
Component
Marks
What's Evaluated
Practical exam
15
Experiment performance
Practical record
5
Lab notebook quality
Project
5
Investigatory project
Viva voce
5
Oral questions
Total
30
Non-Practical Subjects
Component
Marks
What's Evaluated
Periodic Test 1
5
First term test
Periodic Test 2
5
Second term test
Project/Portfolio
5
Subject project
Subject Enrichment
5
Activities, assignments
Total
20
Languages (English, Hindi)
Component
Marks
What's Evaluated
Listening skills
5
Audio comprehension
Speaking skills
5
Oral presentation
Project
5
Literature project
Periodic tests
5
Written tests
Total
20
The AI Detection System — What Happened
The Problem CBSE Identified
In 2024, CBSE analyzed IA marks data and found suspicious patterns:
Red Flag
What It Indicated
90%+ students getting 19-20/20
Likely inflation
No variation in marks
Not genuine evaluation
Sudden jump from previous years
Artificial boosting
Marks not matching theory performance
Inconsistency
How AI Detected Inflation
CBSE used statistical analysis and AI tools to identify:
Detection Method
What It Caught
Standard deviation analysis
Schools with unusually low variation
Historical comparison
Schools with sudden mark increases
Theory-IA correlation
Schools where weak students had perfect IA
Cluster analysis
Groups of schools with identical patterns
The Numbers
Finding
Count
Schools flagged
500+
Students affected
Lakhs
Action taken
Schools asked to justify marks
Repeat offenders
Warned of affiliation review
What Happened to Flagged Schools
Action
Consequence
Show-cause notice
School must explain marking pattern
Re-evaluation demand
Some schools asked to re-assess
Warning letter
On record for future reference
Affiliation review
For repeat offenders
Why Schools Inflate IA Marks
The Pressure Points
Pressure Source
How It Leads to Inflation
Parents
Demand high marks for their children
Competition
Schools compete on "results"
Reputation
Higher marks = better school image
Student pressure
Students expect near-perfect IA
Lack of oversight
No external verification
The Inflation Pattern
Genuine Evaluation
Inflated Evaluation
Marks range: 12-20
Marks range: 18-20
Bell curve distribution
Everyone at top
Weak students get lower IA
Everyone gets same
Matches theory performance
Doesn't match theory
Practice any chapter on Padhaao
AI tutor for CBSE, ICSE & 15 state boards · 10 learning modes · 3 free chapters daily
How IA Marks Should Be Calculated (CBSE Guidelines)
Periodic Tests (10 marks)
Test
Marks
Timing
Periodic Test 1
5
After Unit 1-2
Periodic Test 2
5
After Unit 3-4
Calculation: Average of best 2 out of 3 tests conducted.
Project Work (5 marks)
Criterion
Marks
Content accuracy
2
Presentation
1
Originality
1
Viva/Defense
1
Subject Enrichment (5 marks)
Subject
Enrichment Activity
Mathematics
Math lab activities
Science
Practical activities
Social Science
Map work, projects
Languages
ASL (Speaking-Listening)
Practical Exams (30 marks for Science)
Component
Marks
Evaluation Criteria
Experiment
8
Procedure, observation, result
Record
5
Neatness, completeness
Viva
5
Understanding of concepts
Project
7
Investigatory project quality
Practical file
5
Diagrams, calculations
What This Means for Students
If Your School Was Flagged
Scenario
What Happens
School justifies marks
No change to your marks
School cannot justify
Possible mark moderation
Re-evaluation ordered
Your marks may change
If Your School Wasn't Flagged
Status
Implication
Marks accepted
Your IA marks stand
Future monitoring
CBSE will continue AI checks
How to Ensure Fair IA Marks
For Students
Action
Purpose
Keep all test papers
Evidence of your performance
Maintain practical record
Proof of lab work
Document project work
Evidence of effort
Know your marks breakdown
Understand how marks were given
Questions to Ask Your School
Question
Why It Matters
How were my periodic test marks calculated?
Transparency
What criteria was used for project evaluation?
Fairness
Can I see my practical exam marks breakdown?
Verification
How does my IA compare to my theory performance?
Consistency check
IA Marks and Final Results
How IA Affects Your Total
Subject
Theory
IA
Total
Physics
70
30
100
Chemistry
70
30
100
Mathematics
80
20
100
English
80
20
100
The IA Advantage
Theory Score
IA Score
Total
Percentage
60/70
28/30
88/100
88%
60/70
20/30
80/100
80%
Good IA marks can significantly boost your percentage.
The Risk of Inflated IA
Scenario
Problem
IA: 29/30, Theory: 35/70
Huge mismatch raises flags
All students: 28-30/30
School pattern flagged
IA higher than theory
Credibility questioned
CBSE's Future Plans
Enhanced Monitoring (2027 Onwards)
Measure
Purpose
Real-time IA submission
Track marks as they're entered
AI analysis of all schools
Not just flagged ones
Random verification
Spot checks on schools
Student feedback system
Students can report unfair evaluation
Standardization Efforts
Initiative
Impact
Common practical exams
Same experiments across schools
External practical examiners
Reduce school bias
Digital practical records
Harder to fabricate
Viva by external teachers
Independent evaluation
Frequently Asked Questions
Can my IA marks be changed after submission?
Schools submit IA marks to CBSE before the board exam. Changes after submission require CBSE approval and valid justification.
What if I think my IA marks are unfair?
First, ask your school for a breakdown. If unsatisfied, you can write to CBSE with evidence. However, CBSE rarely intervenes in individual cases unless there's clear evidence of wrongdoing.
Do colleges see my IA marks separately?
Your marksheet shows total marks per subject, not the theory-IA split. However, some competitive exams and colleges may ask for detailed marksheets.
Can I score more in IA than theory?
Yes, it's possible and common. IA is school-evaluated and often more lenient. But a huge gap (e.g., 29/30 IA with 30/70 theory) looks suspicious.
What happens if my school inflated everyone's marks?
If CBSE flags your school, they may moderate marks downward. This affects all students, even those who deserved high marks.
How can I prove my IA marks are genuine?
Keep your test papers, practical records, project files, and any feedback from teachers. This documentation protects you if questions arise.
Will AI checking continue in 2027?
Yes. CBSE has indicated that AI-based monitoring of IA marks will continue and expand.
Can I request re-evaluation of IA marks?
Unlike theory papers, IA marks don't have a formal re-evaluation process. You can raise concerns with your school or CBSE, but changes are rare.
