Revision is an important aspect of exam preparation as it helps in reinforcing concepts and improving retention. For CBSE Class 3 exams, here are some effective ways to revise:

1. Organize your study material:
- Gather all your textbooks, notes, and worksheets in one place.
- Arrange them subject-wise and topic-wise to create a systematic study plan.

2. Create a revision schedule:
- Divide your available time before the exams into smaller study sessions.
- Allocate specific time slots for each subject and topic.
- Follow the schedule strictly to cover all the subjects effectively.

3. Review the syllabus:
- Go through the syllabus of each subject to identify the topics you need to focus on.
- Highlight the important concepts and chapters that carry more weightage in the exams.

4. Make concise notes:
- While revising each topic, create short notes or summaries.
- Write down key points, formulas, definitions, and important examples.
- Use bulleted lists and diagrams to make the notes visually appealing and easy to understand.

5. Practice with sample papers:
- Solve previous years' question papers and sample papers available in your textbooks or on reliable educational websites like EduRev.
- This will help you understand the exam pattern, time management, and the types of questions asked.

6. Utilize online resources:
- Explore online resources like educational websites and apps that provide interactive learning materials, quizzes, and videos.
- Use these resources to revise concepts, practice exercises, and clarify doubts.

7. Take breaks:
- While revising, take short breaks (5-10 minutes) after every 30-45 minutes of study.
- Engage in activities like stretching, deep breathing, or listening to music to relax your mind.
- Avoid spending excessive time on screens during breaks.

8. Revise with a study partner:
- Arrange study sessions with a classmate or friend to revise together.
- Discuss concepts, ask and answer questions, and clarify doubts.
- Teaching and explaining concepts to someone else can enhance your understanding and retention.

9. Use mnemonic devices:
- Mnemonics are memory aids that help in recalling information easily.
- Create acronyms, rhymes, or visual images to remember difficult concepts, formulas, or sequences.

10. Review, revise, and repeat:
- Regularly review your notes and revise the topics you find challenging.
- Revise the entire syllabus multiple times to reinforce your understanding.
- Practice solving problems and answering questions to improve your speed and accuracy.

Remember, consistency and regularity are key to effective revision. Plan your revision well in advance, stay focused, and maintain a positive attitude towards learning. Good luck with your exams!