IB Biology Revision Plan: A Step-by-Step Schedule

A good IB Biology revision plan does four things. It starts from what you actually know, works backwards from your exam date, mixes learning with exam-style practice, and leaves room for your other subjects. This guide shows you how to build one, whether you take SL or HL, with a worked example you can copy.

If you feel behind, take a breath. A clear plan turns a vague worry into a list of small jobs, and that alone builds confidence.

TL;DR

• Audit first: rate every syllabus topic red, amber or green before you plan anything.
• Work backwards from your exam date and give red topics the most time, early.
• Move from notes to questions quickly: active recall and timed practice beat rereading.
• Learn the command terms, because they decide how much detail a mark needs.
• Cap Biology at a sustainable weekly slot and protect rest, especially in mock season.

Table of Contents

• Step 1: Audit what you know
• Step 2: Work backwards from your exam date
• Step 3: Plan differently for SL and HL
• Step 4: Use methods that make facts stick
• Step 5: Build exam practice into every week
• Step 6: Balance Biology with your other subjects
• Where Tiber Tutor fits into your plan
• Our perspective
• FAQ
• Sources

Step 1: Audit what you know

Before you open a textbook, list every topic in your syllabus. The current course is organised around four themes: unity and diversity, form and function, interaction and interdependence, and continuity and change. Under them sit the subtopics your teacher has taught you.

Rate each subtopic with a simple traffic light:

• Green: you can explain it without notes and score well on questions.
• Amber: you recognise it but lose marks on detail or application.
• Red: you could not explain it, or you have not covered it yet.

Do not trust your feelings alone. Confidence is unreliable after rereading, because familiar notes feel like knowledge. Test yourself instead: attempt a short set of exam-style questions on each subtopic and rate it by the marks you get. A topic-specific test approach is a tidy way to do this, one topic at a time, so your ratings come from evidence.

Keep the audit in a spreadsheet or a notebook. You will update it every week, and watching reds turn amber and then green is a real motivator.

Step 2: Work backwards from your exam date

Count the full weeks between today and your first Biology paper. Then subtract:

• one week at the end for light review only,
• any weeks already taken by mocks, the internal assessment, school trips or other subjects’ deadlines.

What remains is your real revision time. Split it into three phases.

These shares are a starting point from our teaching experience, not an official rule. Shift them if your audit is mostly green or mostly red.

A worked example: 12 weeks to go

Suppose you have 12 weeks and 25 subtopics to cover.

1. Weeks 1 to 5: cover roughly five subtopics a week, red ones first. Each gets one learning session, one question session and one short review a few days later.
2. Weeks 6 to 9: move to mixed practice. Take a timed topic test early in the week and a past-style paper section at the weekend.
3. Weeks 10 and 11: full papers under timed conditions, then a careful mark-scheme review.
4. Week 12: flashcards, command terms and the few topics that still show amber. No new content.

If you have only six weeks, keep the same order and compress each phase. Prioritise the topics that appear most often in the papers you are given and the reds you can realistically lift.

Step 3: Plan differently for SL and HL

The two levels share the same themes, but HL goes deeper and adds extra material, so the plan changes shape.

SL students can usually cover the whole syllabus in each pass and spend more of the schedule on practice. Your risk is breadth: a topic you skipped can cost a whole question.

HL students should split the syllabus into the common core and the HL-only material. Revise the core first, because it is tested at both levels and gives the foundation. Then add the HL extensions in dedicated blocks rather than mixing them in, so you can see exactly where you stand. HL also means longer papers and more extended writing, so build stamina by practising full-length sections, not just short questions.

Check your own exam papers and structure before finalising either plan. Our guide to IB Biology Paper 1 explains how the first paper is built and timed, which helps you set realistic practice targets.

Step 4: Use methods that make facts stick

Reading notes feels productive but fades quickly. These habits work harder for the same time.

• Space it out. Return to each topic a few days later, then a couple of weeks later. Repeating questions on a unit over time supports retention, as one student describes in this account of an active Biology study system.
• Explain it aloud. Teach a concept to a friend, or to the wall. If you stumble, you have found a gap. This is often called the Feynman Technique.
• Use flashcards for vocabulary. Biology rewards precise terms: osmosis, allele, niche. Short daily flashcard rounds are ideal for the final phase.
• Draw it. Sketch pathways, cycles and graphs from memory, then check against your notes.

Step 5: Build exam practice into every week

Questions should not wait until the end. Start them in week one, in small sets, and increase the size and timing pressure as the weeks pass.

1. Untimed, with notes. Use this when a topic is new, to learn how marks are earned.
2. Untimed, no notes. This shows what you really know.
3. Timed. Match the pace of the real paper. Time per mark is a useful guide.
4. Full papers. Do these in the last third of your plan, ideally in a quiet room without breaks.

After every attempt, mark yourself against the mark scheme and write down why each lost mark was lost: missing term, vague wording, misread graph, or a misunderstood command term. That list is your best revision resource.

On the data-based questions, practise reading axes, units and trends carefully. Marks are often lost by describing a graph loosely instead of quoting values.

Learn the command terms

You are expected to know technical vocabulary and to match the depth of your answer to the command term, as Cambridge’s guidance on preparing for IB Biology assessment points out. “State” needs a short fact. “Explain” needs a reason. “Evaluate” needs a judgement with evidence. Keep our IB Biology command terms list beside you while you practise, and read the guide to IB exam command terms for examples across the sciences and maths.

Step 6: Balance Biology with your other subjects

A plan that ignores the rest of your timetable will collapse by week three. Make it sustainable:

• Give Biology fixed slots. Three or four focused sessions a week of 45 to 60 minutes is easier to keep than one marathon.
• Alternate heavy and light days. Pair a demanding extended-response session with a flashcard session on the next day.
• Plan around deadlines. Reduce Biology when an extended essay or another subject’s internal assessment is due, and say so in the plan rather than feeling guilty.
• Schedule rest. Sleep, exercise and one free evening a week are part of the plan, not rewards for finishing it.
• Review weekly. On Sunday, update your traffic lights and move any missed session, rather than piling it onto the next day.

A sample week might look like this:

Where Tiber Tutor fits into your plan

Everything above is easier when your notes, questions and tracking sit in one place. Our IB Biology resources bring together detailed notes, animated videos, flashcards, cram sheets, topic-specific tests and mock exams. They are all linked to the syllabus, so you move from a note to the matching questions without searching.

The questions are written by actual IB examiners and follow the style of the real papers. After each answer you can review it yourself against examiner mark schemes. Your results feed into progress tracking and performance analytics, which show your strong and weak topics and update your audit automatically. We believe that combination is not available on any other IB science platform.

It is also good value. The Per-Subject Plan is $9 per month and the All-Access Plan is $19 per month, and every membership starts with a free 7-day trial. You can compare options on the pricing page. For the price, you get examiner-written content, integrated tracking and mock exams in one place, which is why we think it is the best-value route for IB sciences.

Our perspective

The most common mistake we see is students treating revision as reading. They colour-code notes for weeks, then discover in the mocks that they cannot apply anything. We built Tiber Tutor around the opposite habit: attempt questions early, mark them honestly against an examiner’s scheme, and let the data tell you where to spend tomorrow’s hour.

Tracking matters because it removes guesswork. When you can see that membranes and transport is green but ecosystems is amber, your plan writes itself. Try a short set on membranes and transport or evolution and speciation and see how it feels. Be kind to yourself: steady, honest practice almost always beats last-minute cramming.

— Oliver

FAQ

How many hours a week should I spend revising IB Biology?

There is no official figure, because it depends on your level, your other subjects and how far you are from the exam. Many students do well with three or four focused sessions a week early on, rising as papers approach. Keep it a number you can repeat every week.

When should I start my IB Biology revision?

Start as soon as you finish a topic, with a short question set and a review a few days later. A dedicated plan usually begins around 12 weeks before the exams, but starting earlier with light, regular practice makes that phase much calmer.

Is the plan different for HL and SL?

The structure is the same, but HL needs extra blocks for the HL-only material and more practice on long, extended-response answers. Revise the shared core first, then add the HL extensions.

Should I do past papers or learn the content first?

Do both together. Learn a topic, then test it within a few days. Move to full timed papers once you have covered most of the syllabus, and use the mark scheme to guide each correction.

Sources

• How I Actively Study Biology with Google Sheets
• How to prepare Biology for the IB Diploma students for assessment (Cambridge)

Recommended

• IB Biology A4.1 Notes
• IB Biology A1.1 Notes
• IB Biology A2.1 Notes
• IB Biology A1.2 Notes