Publication Information, Educational Objectives, and Curriculum Structure of Class X Science

Publication Details and Distribution Framework

The Science textbook for Class X is published by the National Council of Educational Research and Training (NCERT), an organization headquartered at the Sri Aurobindo Marg in New Delhi, pinpointed at the postal code $110016$. The publication history begins with the first edition in December $2006$ (Agrahayana $1928$), followed by many reprints occurring between November $2007$ and November $2021$. A revised edition was released in October $2022$ (Kartika $1944$), followed by reprints in March, June, and December of $2024$. The current reprint for the academic cycle is dated $2026-27$ (Magha $1947$). The production specifies a paper quality of $80\,GSM$ featuring the NCERT watermark. The book is priced at a fixed rate of $160.00$, and any modification of this price via stamps or stickers is considered invalid.

Institutional reach is maintained through various publication division offices across India. These include the New Delhi campus ($011-26562708$), the Bengaluru office on $100$ Feet Road at Hosdakere Halli Extension ($080-26725740$), the Ahmedabad office at the Navjivan Trust Building ($079-27541446$), the Kolkata campus at Panihati ($033-25530454$), and the Guwahati complex at Maligaon ($0361-2674869$). The textbook is identifying under ISBN $81-7450-636-5$. The publication team is led by M.V. Srinivasan (Head, Publication Division), Bijnan Sutar (Chief Editor), Amitabh Kumar (Chief Business Manager), and Deepak Jaiswal (Chief Production Officer in charge).

Educational Philosophy and National Curriculum Framework 2005

The National Curriculum Framework (NCF) $2005$ serves as the foundational guide for this textbook, advocating for a significant link between a child's school life and their life outside the educational institution. This approach seeks to move away from the traditional legacy of bookish learning, which has historically created a divide between school, home, and the community. By implementing NCF guidelines, the curriculum aims to discourage rote learning and dissolve the sharp boundaries that often separate different subject areas. This transition aligns with the child-centered system of education outlined in the National Policy on Education ($1986$).

Successfully implementing this vision requires school principals and teachers to encourage self-reflection and imaginative questioning among students. The framework recognizes that children generate new knowledge when they are given the space, time, and freedom to engage with information rather than just receiving it. It is critical that the textbook is not treated as the sole basis for examinations, as such a narrow focus leads to the neglect of other learning resources. Teaching and evaluation methods are designed to make school a happy experience rather than a source of stress. This involves structural changes including flexible daily timetables and a commitment to maintaining the rigour of the annual calendar to ensure sufficient teaching days.

Content Rationalization and the National Education Policy 2020

In response to the COVID-19 pandemic and the directives of the National Education Policy $2020$, NCERT undertook a process to rationalise the content load across all textbooks. The primary objective is to reduce the volume of material to provide more space for experiential learning and the development of a creative mindset. This rationalization acknowledges the Learning Outcomes already established by NCERT across different classes.

Content was removed or modified based on specific criteria: overlapping material within the same class across different subjects, similar content found in higher or lower classes, the inherent difficulty level of the material, and the presence of content that students can master through self-learning or peer-learning without significant teacher intervention. Additionally, content deemed irrelevant in the modern context was excised. This textbook represents a reformatted version reflecting these changes to ensure a more streamlined and effective learning path.

Integrated Pedagogical Approach and Textbook Features

The Class X Science textbook adopts an integrated approach, consciously avoiding sharp divisions between Physics, Chemistry, Biology, and Environmental Science. The syllabus is organized around five broad themes: Materials, The World of the Living, How Things Work, Natural Phenomena, and Natural Resources. Each chapter typically begins with examples from daily life or a relevant hands-on activity, as the book is fundamentally activity-based. This requires students to participate in the construction of their own knowledge rather than memorizing definitions and technical terms.

Social concerns are integrated throughout the text, including issues such as gender discrimination, the needs of people with special requirements, and the management of energy and the environment. Students are encouraged to engage in scientific analysis and debates regarding sustainable development. To maintain clarity without sacrificing scientific rigour, challenging ideas intended for higher levels are placed in light orange boxes, which are non-evaluative and may include scientist biographies. The book includes in-text questions for self-assessment, a quick review of important points at the end of every chapter, and exercises with varying levels of difficulty, including multiple-choice questions. Answers to numerical problems and hints for difficult questions are provided at the end of the volume.

Textbook Development Committee and Leadership

The development of this resource was overseen by a diverse group of experts. Professor J.V. Narlikar, Emeritus Professor at the Inter-University Centre for Astronomy and Astrophysics (IUCAA) in Pune, served as the Chairman of the Advisory Group for Textbooks in Science and Mathematics. Professor Rupamanjari Ghosh from the School of Physical Sciences at Jawaharlal Nehru University (JNU), New Delhi, acted as the Chief Advisor. Dr. Anjni Koul served as the Member-Coordinator from the Department of Education in Science and Mathematics (DESM), NCERT.

Key administrative and academic support was provided by Professor Krishna Kumar (Director, NCERT), Professor G. Ravindra (Joint Director), and Professor Hukum Singh (Head, DESM). The committee included representatives from various institutions, including Regional Institutes of Education (RIE) in Ajmer, Bhopal, Mysore, and Bhubaneswar, as well as several PGT and TGT teachers from schools across India such as Salwan Public School and Kendriya Vidyalaya. Their collective effort focused on revising, editing, and refining the manuscript to meet modern pedagogical standards.

Curricular Structure and Table of Contents

The curriculum is divided into $13$ core chapters, followed by an answer section and a concluding preamble. The chapters are as follows:

Chapter 1: Chemical Reactions and Equations (Page $1$) Chapter 2: Acids, Bases and Salts (Page $17$) Chapter 3: Metals and Non-metals (Page $37$) Chapter 4: Carbon and its Compounds (Page $58$) Chapter 5: Life Processes (Page $79$) Chapter 6: Control and Coordination (Page $100$) Chapter 7: How do Organisms Reproduce? (Page $113$) Chapter 8: Heredity (Page $128$) Chapter 9: Light – Reflection and Refraction (Page $134$) Chapter 10: The Human Eye and the Colourful World (Page $161$) Chapter 11: Electricity (Page $171$) Chapter 12: Magnetic Effects of Electric Current (Page $195$) Chapter 13: Our Environment (Page $208$)

The book ends with Answers starting on page $218$.

Constitutional Foundations of India

The textbook includes the Preamble to the Constitution of India, which serves as a solemn resolution to constitute India into a Sovereign Socialist Secular Democratic Republic. This document outlines the fundamental objectives of the nation: to secure for all citizens Justice (social, economic, and political), Liberty (of thought, expression, belief, faith, and worship), and Equality (of status and of opportunity). Furthermore, it aims to promote Fraternity, assuring the dignity of the individual and the unity and integrity of the Nation. This document was adopted, enacted, and given to the people in the Constituent Assembly on the twenty-sixth day of November, $1949$. Subsequent amendments, such as the Constitution (Forty-second Amendment) Act of $1976$, updated the language to include "Socialist Secular" and changed "Unity of the Nation" to "unity and integrity of the Nation," effective from January $3$, $1977$.