1. NCERT Textbook:
The NCERT textbook for History in CBSE Class 9 is the primary resource for studying the subject. It provides a comprehensive overview of the topics and is designed as per the CBSE syllabus. The textbook includes engaging narratives, illustrations, and exercises to enhance understanding.

2. NCERT Exemplar:
The NCERT Exemplar is a supplementary book that offers additional questions and exercises for practice. It contains a variety of questions, including multiple-choice, short answer, and long answer questions, that help students develop a better understanding of the concepts.

3. Sample Papers:
Sample papers are an excellent resource for exam preparation. They provide students with an idea of the question pattern and help them familiarize themselves with the exam format. Solving sample papers also aids in time management and boosts confidence.

4. Previous Year Question Papers:
Previous year question papers are crucial for understanding the exam pattern and the types of questions asked in the CBSE Class 9 History exam. By solving these papers, students can gauge their preparation level and identify their weak areas.

5. Reference Books:
Apart from the NCERT textbook, there are several reference books available in the market that can provide additional insights and explanations. Some popular reference books for CBSE Class 9 History include "India and the Contemporary World - I" by S. N. Sen and "Golden Rays - A Collection of History" by R. Singh.

6. Online Resources:
There are numerous online resources available, such as websites, educational portals, and videos, that can supplement the learning process. EduRev is an excellent platform that offers study materials, notes, sample papers, and practice tests for CBSE Class 9 History.

7. Class Notes:
Taking thorough notes during class lectures is essential for effective studying. These notes can serve as a quick reference during revision and help students recall important points.

8. Group Study:
Collaborating with classmates for group study can be beneficial in understanding different perspectives, discussing concepts, and clarifying doubts. It also provides an opportunity for interactive learning.

9. Online Discussion Forums:
Participating in online discussion forums related to CBSE Class 9 History can be helpful in engaging with fellow students and seeking clarification on doubts. It allows students to learn from each other and exchange information.

10. Mind Maps and Diagrams:
Creating mind maps and diagrams can aid in organizing information and visualizing historical events and concepts. They help in better understanding and retention of the subject matter.