Final Revision Guide for CBSE Class 10 & 12: What to Study and What to Skip in December

December is the month when clarity matters more than effort. With board exams approaching, most students feel stuck between two questions:

• “Ab kya padhna chahiye?”

• “Aur kya chhod dena safe hai?”

At this stage, studying everything again is neither practical nor effective. December is not about covering more chapters; it’s about making smart academic decisions. This blog acts as a final revision guide for CBSE Class 10 and 12 students, helping them decide what to focus on, what to revise lightly, and what to skip to maximize scores.

Why December Revision Needs a Different Approach

By December:

• Syllabus is mostly completed

• Pre-boards are ongoing or about to begin

• Time is limited

• Stress levels are high

This means:

• Random revision won’t work anymore. 

• Selective, exam-oriented revision will.

Students who score high in boards are not the ones who study everything again; they are the ones who revise the right things at the right time.

The Golden Rule of December Preparation

Before we break it down class-wise, remember this simple rule:

In December, 70% of your time should go into high-weightage + familiar chapters, and only 30% into weaker areas.

Trying to “fix everything” usually leads to confusion and burnout.

For CBSE Class 10 Students

What to Study Seriously in December

1. Science (High Priority)

Focus on:

• Chemistry chapters (Reactions, Acids, Metals & Non-metals, Carbon Compounds)

• Biology chapters with diagrams and definitions

• Physics numericals + laws

Why?

Science is concept-based and scoring if revised properly. NCERT lines, diagrams, and numericals must be crystal clear.

2. Mathematics

Must-do areas:

• Trigonometry (identities + applications)

• Algebra (polynomials, quadratic equations)

• Geometry basics + theorems

• Statistics & Probability

December goal:

• Accuracy

• Step-wise presentation

• Speed

3. Social Science

High-scoring areas:

• Civics (short, direct answers)

• Economics (definitions + numericals)

• History timelines

• Geography maps & diagrams

Revise using short notes + previous year questions.

4. English

Focus on:

• Writing formats (letters, articles, notices)

• Grammar rules

• Important literature questions

English marks depend heavily on presentation and practice, not mugging.

What Class 10 Students Can Skip or Minimize

• Very low-weight chapters you already understand

• Rewriting entire notes again

• Studying from multiple guidebooks

• Memorizing answers word-to-word

If you know a chapter reasonably well, don’t over-revise it.

Also Read: Why Mock Tests Are the Secret Weapon for Scoring High in Board Exams

For CBSE Class 12 Students

Class 12 syllabus is vast, and December demands strong filtering.

What to Study Seriously in December

Science Stream (PCM / PCB)

Physics

• Numericals & derivations from core chapters

• Formula clarity + unit accuracy

Chemistry

• Organic reactions & mechanisms

• Named reactions

• Inorganic NCERT lines

Biology

• Human Physiology

• Genetics & Evolution

• Ecology

• Diagrams + keywords

Focus on NCERT-based conceptual clarity, which benefits boards and NEET both.

Commerce Stream

Accountancy

• Balance sheet formats

• Adjustment entries

• Cash flow statements

Business Studies

• Case-study questions

• Definitions + headings

• Chapter summaries

Economics

• Diagrams

• Numericals

• Key terms

Presentation and structure decide marks here.

Humanities Stream

High-priority focus:

• Political Science case-based answers

• History long answers with headings

• Geography maps + diagrams

• Psychology definitions + applications

Write answers daily; Humanities marks depend heavily on expression quality.

What Class 12 Students Should Avoid in December

• Starting brand-new chapters from scratch

• Ignoring NCERT and using only reference books

• Studying theory without answer-writing practice

• Giving mocks without analysing them

December is about revision + refinement, not expansion.

The “Must Do – Good to Do – Can Skip” Formula

Use this for every subject:

• Must Do: High-weightage + familiar chapters

• Good to Do: Medium-weightage chapters you understand

• Can Skip: Low-weightage chapters that confuse you

This simple classification brings instant clarity.

Writing Practice Is NON-NEGOTIABLE

Especially for boards, students lose marks not because they don’t know the answers, but because they don’t present them well.

December must include:

• Daily 30–40 minutes of answer writing

• Practicing 3-mark and 5-mark questions

• Writing with headings, points, and diagrams

• Learning CBSE marking scheme expectations

This alone can improve scores by 10–15 marks.

Use Mock Tests to Decide What to Skip

Mock tests in December are not for judging intelligence; they are for decision-making.

After each mock:

• Identify weak chapters

• Decide whether to improve or skip

• Track time management

• Check presentation mistakes

Mocks tell you where to invest time and where not to.

Common December Mistakes Students Make

Avoid these at all costs:

• Studying everything every day

• Panicking after low mock scores

• Changing strategy every week

• Overloading with multiple books

• Ignoring rest and sleep

December needs discipline, not desperation.

How HomeGuru Helps Students Revise Smartly in December

At HomeGuru, December preparation is handled with precision and personalization.

What HomeGuru Focuses On:

• High-weightage topic revision

• Board-oriented answer-writing

• Weekly mock tests + analysis

• 1:1 doubt solving

• Personalized improvement plans

• NCERT-focused teaching

• Stress-free, guided preparation

Instead of asking students to “study more,” HomeGuru helps them study smarter.

“December is not about how much you study; it’s about what you choose to study.”

Also Read: December Blueprint: How Students Should Prepare for Boards, JEE & NEET Together

Final Thoughts

December is the month when students must stop overthinking and start refining.

Knowing what to skip is just as important as knowing what to study.

When preparation becomes selective, focused, and calm, performance naturally improves.

With the right revision strategy and expert guidance, December can become the turning point that transforms effort into results.

Confused about what to revise and what to skip this December?Join HomeGuru’s Board Exam Crash Courses for personalized revision, mock tests, and expert mentoring. Visit: www.homeguruworld.com or call: +91 90019 90019