CBSE Class 10 Deleted Syllabus 2026: Maths, Science, SST & English [Updated List]

The Central Board of Secondary Education (CBSE) has significantly changed the Class 10 syllabus for the academic session 2026. To reduce the burden on students and provide them with a more manageable curriculum, CBSE has implemented a 30% Reduction in the syllabus for all subjects in Class 10. We will address the CBSE Class 10 Deleted Syllabus 2026 throughout the guide!

This article aims to provide a detailed overview of the deleted syllabus for CBSE Class 10, highlighting the benefits of this reduction and the implications for students preparing for their board exams.

The removed portions pertain to various subjects now deemed “Irrelevant” by the board. Look at what is now deleted from the CBSE Class 10 Deleted  Syllabus in various subjects.

The following Subjects will Have Some of their Content Removed from the Syllabus:

• Check Mathematics Syllabus
• Check Science Syllabus
• Check English Syllabus
• Check Hindi Syllabus
• Check the Social Science Syllabus

Overview of Deleted Class 10th Syllabus 2026: Subject-wise!

Find here the CBSE Class 10 Deleted Syllabus of all subjects, which consists of the chapters and topics removed from Class 10 in the 2025-26 academic session.

1. Mathematics:

When reviewed, the CBSE removed a few topics that they think are irrelevant in today’s learning environment. The Mathematics topics that are removed include statistics and probability. The non-essential exercises from these sections have been removed to maintain the essence of the entire subject.

2. Science:

Similarly, several topics from the ‘Science Subject’ have been removed. This subject deletion is decided based on the relevance of the topics in the education and learning pattern. Since they are not helpful to keep, the board has decided to delete them. The topics were removed from all three subsidiaries of the Science subjects: Physics, Biology, and Chemistry.

3. Social Science:

Some syllabus reductions are also seen in social science. Topics that did not seem relevant were removed. This entire syllabus reduction happened in all social science fields, including History, Geography, Political Science, and Economics.

4. English:

To boost its relevance and keep the focus on learning the language model, the board has decided to exempt a few parts of the English syllabus. The sections from literature texts and grammar were removed.

5. Languages:

Again, reducing language-specific subjects was done, keeping the relevancy in mind. Deletions in language subjects were carried out to balance linguistic proficiency.

Purpose Behind Class 10 Syllabus Deleted

Given below are the motives behind reducing the class 10 syllabus.  Do check the list of reasons behind such crucial step:

1. Organize Syllabus:

The primary motive behind the deletions is to streamline the content of the syllabus. Removing certain portions makes the curriculum more focused, allowing students to delve deeper into essential concepts without unnecessary non-essential details.

2. Adapting to Current Educational Needs:

The field of education is dynamic, and the curriculum must adapt to current educational needs. The deletions respond to the changing educational landscape, ensuring the syllabus remains relevant and effective.

3. Addressing Student Well-being:

To align with the National Education Policy (NEP) 2020, CBSE aims to move away from rote learning towards competency-based evaluation

4. Focusing on Core Competencies:

By removing certain portions, the focus is sharpened on core competencies. Students are encouraged to master fundamental concepts in each subject, fostering a deeper understanding that forms the basis for future academic pursuits.

5. Manageability within the Academic Calendar:

The academic year has a finite duration, and the syllabus modifications ensure that the curriculum is manageable within this timeframe. Striking a balance between comprehensive learning and practical constraints is a key consideration.

Benefits of Reduced Syllabus for Students:

Check the list of benefits of the reduced syllabus of class 10 NCERT 2026-27. Students must consider the points given below to score well in their examinations.

Benefit 1: Examination Preparation:

Since a part of your subject syllabus is reduced, focusing on exam preparation is beneficial. Now, students can have more time to devote to a particular subject, leading to greater grades, which was difficult earlier due to the burden of the syllabus.

Benefit 2: In-depth Understanding:

Students will have more time to address each subject, which means that the more focused they are, the more understanding they will have of the subject.

Benefit 3: Reduced Academic Load:

Due to the reduced syllabus for each subject, the learning process becomes smooth. Students can now take an interest in their studies and the learning process since they will have ample time.

Benefit 4: Enhanced Learning Outcomes:

Focusing on only relevant topics has become easier now. Students don’t have to rush to cover everything for the examination. Just following the right approach, gaining sufficient marks is possible.

Benefit 5: Adaptability to Online Learning:

The ‘changed syllabus’ has become easier to approach through different learning methods: online or Offline. The purpose of the revised syllabus is to maintain study through different methods.

CBSE Class 10 Deleted Syllabus 2026

Subject 1: Deleted Topics of Maths Class 10 (2025-26)

The entire chapter “Constructions” has been deleted. Below is the final list of removed topics:

Chapter Name	Deleted Topics / Chapters
Real Numbers	Euclid’s Division Lemma, Decimal representation of rational numbers
Polynomials	Division algorithm for polynomials
Pair of Linear Equations	Cross Multiplication Method, Simple reducible equations
Triangles	Proof of theorems: Areas of similar triangles, Pythagoras Theorem
Coordinate Geometry	Area of a triangle
Constructions	FULL CHAPTER DELETED
Trigonometry	Trigonometric ratios of complementary angles
Surface Areas & Volumes	Frustum of a cone, Conversion of solids
Statistics	Step Deviation Method, Cumulative Frequency Graph (Ogive)

 

Subject 2: Deleted Topics of Science Class 10 (2025-26)

Note: “Periodic Classification” and “Sources of Energy” are completely removed from the syllabus.

Chapter Name	Deleted Topics / Page Numbers
Periodic Classification	FULL CHAPTER DELETED (Pages 79-92)
Heredity and Evolution	Evolution part, Speciation, Evolution & Classification, Fossils (Pages 147-158)
The Human Eye	Colour of Sun at Sunrise/Sunset, Why do we have two eyes? (Pages 196-197)
Magnetic Effects	Electric Motor, Generator, Electromagnetic Induction, Michael Faraday Box (Pages 232-237)
Sources of Energy	FULL CHAPTER DELETED (Pages 242-255)
Sustainable Management	FULL CHAPTER DELETED (Internal Assessment Only)

 

Subject 3: Social Science Deleted Topics (2025-26)

Subject	Deleted / Restricted Topics
History	Ch 3: The Making of a Global World: Only Sub-topics 1 to 1.3 are in Board Exam. The rest is for Interdisciplinary Project. Ch 4: The Age of Industrialization: Periodic Assessment Only (NOT in Board Exam).
Political Science	Democracy and Diversity (Full Chapter Deleted) Popular Struggles and Movements (Full Chapter Deleted) Challenges to Democracy (Full Chapter Deleted)
Geography	Types of Resources (Box), Flora/Fauna details, Impact of Globalization on Agriculture, Manufacturing (Cotton, Jute, Sugar).

Subject 4: Deleted Syllabus of Hindi Course A (2025-26)

Textbook	Deleted Chapter (Full Removal)
Kshitij Part 2 (Kavya)	Dev (Savaiya), Girija Kumar Mathur (Chaya Mat Chuna), Rituraj (Kanyadan)
Kshitij Part 2 (Gadya)	Mahavir Prasad Dwivedi (Stri Shiksha…), Sarveshwar Dayal Saxena (Manviya Karuna…)
Kritika Part 2	George Pancham Ki Naak, Ehi Thaiya Jhulni Herani Ho Rama

 

Subject 5: Computer Applications (Code 165) Syllabus 2025-26

Important Update: The “Scratch vs. Python” choice has been removed from the Board Theory Exam. The 2026 exam follows this unified structure:

Unit Name	Marks	Key Topics
1. Networking	15	Internet services, Cloud, Protocols (TCP/IP, HTTP, SMTP), Secure File Transfer (SFTP).
2. HTML	25	Web design, Images, Links, Tables, Forms, CSS, Audio/Video tags.
3. Cyber Ethics	10	Netiquettes, IPR, Plagiarism, E-commerce safety.
4. Practicals	50	Lab Report & Project Work (HTML/Networking).

 

{Frequently Asked Questions}

Q – Is the Class 10th 2025-26 syllabus reduced?

The board has decided to maintain the 2025-26 academic session changes. With the cut in the CBSE Class 10 syllabus, students will now have to study less syllabus than in previous years, thereby reducing the burden on students preparing for the upcoming board exams.

Is 10th Board Removed 2025-26?

No, the CBSE will be conducting exams for class 10^th and 12^th in 2025-26. The exam will be held in February 2026. Students should prepare for their board exams with the right strategy to complete the syllabus on time, and get enough time to revise what’s being studied.

Q – What is the deleted syllabus of class 10?

Chapters on Real Numbers, Polynomials, Quadratic Equations, Triangles, Introduction to Trigonometry, Constructions, and other topics are included in the CBSE Class 10 Deleted Syllabus 2025-26. Please see the table below to understand the Class 10 CBSE syllabus for the subject.

Q – Will CBSE reduce the syllabus for 2026?

For the academic year 2025-26, the Central Board of Secondary Education reorganized the Class 10 syllabus by thirty per cent. Furthermore, the deleted syllabus of Class 10 CBSE 2025-26 has adjusted chapter-by-chapter weightage and marks distribution.

Q – Is the Class 10 syllabus reduced for 2025-26?

Yes, you will see the updated, reduced syllabus in the 2025-26 session. This is for keeping the burden away from students, helping them to focus more on the learning part, and getting promising marks to advance in the future.

The Bottom Line!

The reduced syllabus of class 10 NCERT 2026 has several benefits. It helps students feel free from the burden of subjects and helps them focus on crucial subjects and interesting topics. Also, due to the reduced class 10 syllabus, students will have sufficient time to build and implement a strategy to get good marks in their board examinations. Overall, this improves the entire exam results.