Edexcel IAL Biology · Units 4, 5 & 6 (WBI14–WBI16)

Master IAL Biology Units 4, 5 and 6 — Where the A* Is Decided

The second half of IAL Biology is a different challenge: synoptic questions, heavier application, and a second practical paper. This course teaches Units 4, 5 and 6 in the exact language the mark schemes reward.

$250 $350 Save $100 · full access to Units 4, 5 and 6 · one payment · 2 years of access

Trusted by 577+ students · 2,000+ students taught in 40+ countries · instant access
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Mr. Hosni teaching Edexcel IAL A2 Biology - Head of Science and author of 8 published textbooks
Units 4–6
WBI14 · WBI15 · WBI16
Line illustration representing Units 4, 5 and 6 of the IAL A2 Biology course
12 × 90 min
Video lessons per unit + revision classes
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Jan · June · Oct
Fits every IAL sitting and resit
Line illustration representing the January, June and October examination sittings available for IAL A2 Biology
2 years
Access across all your devices
Line illustration showing two-year access to IAL A2 Biology lessons across multiple devices

Proof the method holds at the very top

A Pearson Edexcel Outstanding Learner Award — not a marketing line.

Pearson Edexcel Outstanding Learner Award: Highest Mark in Kuwait, International Advanced Subsidiary Biology, January 2024

Kuwait's highest IAL Biology mark

One of Mr. Hosni's students earned Pearson Edexcel's Outstanding Learner Award for the highest IAL Biology mark in Kuwait (January 2024 session) — built on the same notes, solved papers and mark-scheme training you get here. If you're chasing the A* at A2, this is the standard the course is calibrated to.

Units 4, 5 and 6, exactly as Edexcel structures them

Full coverage of the A2 half of the Edexcel IAL Biology specification, taught in specification order.

Unit 4 · WBI14

Energy, Environment, Microbiology & Immunity

Photosynthesis and ecosystems, climate change evidence, microbiology and aseptic technique, immunity and forensics — where data-handling and application questions pile up.

Unit 5 · WBI15

Respiration, Internal Environment, Coordination & Gene Technology

Respiration and exercise physiology, homeostasis, the nervous system and brain, plus gene technology — the unit that decides most A* averages.

Unit 6 · WBI16

Practical Skills in Biology II

The A2 practical paper: experimental design, statistics, evaluating methods, and writing plans and conclusions in the phrasing examiners credit.

Unit 5 Article — Covered for You

The scientific article? Consider it handled.

The Unit 5 scientific article of your exam session will be fully explained, with predictable questions that are very likely to appear in your actual exam . Mr. Hosni takes personal responsibility for this part of your paper — you walk in having already worked through it.

  • A complete list of likely exam questions on the article
  • Model answers written in mark-scheme language
  • A clear summary of the whole article
  • Clarifications of every difficult concept it contains

IAL Biology (AS + A2) — June 2026

IAL Biology students (AS + A2 pooled): 62.6% A/A*, 24.2% B, 8.4% C, and 4.7% D or below. AS awards A–E; A* applies only at A2.

62.6% A/A*

Inside the full A2 Biology system

Built for the 2026–2027 exams — content, practicals and technique in one place.

  • Complete video lessons for Units 4 and 5, every A2 topic taught step by step
  • Unit 6 practical training: experimental design, statistics, graphs and evaluation
  • Extra revision classes that convert content into exam performance
  • Solved Unit 4 and Unit 5 past papers written point-for-point with the mark scheme
  • The Unit 5 scientific article fully explained: likely questions, model answers, summary and clarifications
  • eBooks and clear notes designed for fast pre-exam revision
  • Technique training for synoptic questions, data analysis and long answers
  • Quizzes, flashcards and progress tracking to expose weak topics before the exam does
  • 2 years of access on all devices, with WhatsApp support answered by Mr. Hosni

Look inside the Unit 4–6 notes and materials

Open the books below and browse real pages from the notes and solved past papers — judge the teaching for yourself before deciding.

Edexcel IAL Biology Units 4-6 notes book cover Units 4–6 Notes Sample See the teaching style inside 📖 Tap to open
IAL Biology Unit 4 Solved Past Papers book cover Unit 4 Solved Past Papers WBI14 answers in mark-scheme language 📖 Tap to open
IAL Biology Unit 5 Solved Past Papers book cover Unit 5 Solved Past Papers WBI15 answers in mark-scheme language 📖 Tap to open
IAL Biology Unit 6 Solved Past Papers book cover Unit 6 Solved Past Papers WBI16 practical answers in mark-scheme language 📖 Tap to open

See how the Biology course combines lessons, concise notes, quizzes, flashcards and past-paper questions. The video gives you a clear study sequence, from learning a chapter to practising the exact language and skills needed in exam answers.

Choose how much of A2 you need

Sitting all three units? Take the full A2 system. Resitting Unit 4 or 5 for the A* average? Buy just that unit. Every option includes 2 years of access.

Not sure yet? Try a full free class first — no card needed, or ask Mr. Hosni on WhatsApp which package fits your plan — a refund policy applies (see the FAQ below).

Most popular IAL Biology Units 4-6 complete course - notes, solved past papers and videos Save $100

Full Course · Units 4, 5 & 6

$250 $350
  • All Unit 4 & 5 video lessons and eBooks
  • Unit 6 practical exam training
  • Extra revision classes
  • Solved past papers & exam techniques
Start A2 Biology Now
IAL Biology Unit 4 (WBI14) course package Save $50

Unit 4 only · WBI14

$100 $150
  • Unit 4 eBook & 12 video lessons (75 min each)
  • Solved WBI14 past papers with full explanations
  • Quizzes, flashcards & progress tracking
  • Application & data-question technique
Get Unit 4
IAL Biology Unit 5 (WBI15) course package Save $50

Unit 5 only · WBI15

$100 $150
  • Unit 5 eBook & 12 video lessons (75 min each)
  • Solved WBI15 past papers with mark-scheme guidance
  • Quizzes, flashcards & progress tracking
  • Synoptic & long-answer technique
Get Unit 5
IAL Biology Units 5 and 6 course package with practical training Save $50

Units 5 + 6 · WBI15 & WBI16

$150 $200
  • Unit 5 eBook and 12 video lessons
  • Unit 5 solved past papers
  • Unit 6 practical exam training
  • Quizzes, flashcards & progress tracking
Get Units 5 + 6
Save $300 · Full A-level

IAL Biology Complete Course (Unit 1 → Unit 6)

Need AS revision alongside A2, or restarting the full qualification? One package covers all six units, both practical papers, and every set of notes.

  • Complete video lessons, Unit 1 to Unit 6
  • Structured revision plan for AS and A2
  • Unit 3 and Unit 6 practical exam training
  • Exam-style questions and solved past papers
  • Graph, application & long-answer techniques
  • All notes and course materials included
IAL Biology complete package covering AS and A2, Units 1 to 6
$400 $700
All six units · AS + A2
Get All 6 Units
Secure payment · Instant access after purchase

Judge the teaching before paying

A free A2 Biology lesson — long-answer practice and exam-focused strategy, exactly as taught inside the course.

IAL A2 Biology

A free lesson for Units 4, 5 and 6 with long-answer practice and exam-focused strategies.

Watch Free Lesson

Who teaches the course

Mr. Hosni, Head of Science and A-level Biology and Chemistry teacher
Mr. Hosni — Head of Science
20+ years of teaching, 16 of them at A-level · Author of 8 published science textbooks — more than 20,000 copies sold worldwide · Edexcel IAL Biology & Chemistry specialist · MSc Biochemistry & Biotechnology, University of Brussels · Teacher of a Pearson Edexcel Outstanding Learner Award winner · 2,000+ students in 40+ countries.

Straight from IAL Biology students

"This course helps me with Unit 6. Notes plus solved past papers made me consistent across all past papers — I finished with full UMS."

Nouf Al-Anazi
IAL A2 Biology · Saudi Arabia · Full UMS, Unit 6

"I focused on Unit 5 using the recordings and quizzes. Even with limited time, I moved from a C to an A in the mock and felt calm on exam day."

Aqil Hussain
IAL A2 Biology · Pakistan · C → A

"I found this course on YouTube. It made my life easier — he explains things just as they are coming in the exam paper."

Li Shan
IAL A2 Biology · Singapore

"He writes the answers in a clear way, which makes it easy to study and understand. I used this A2 package one week before the Unit 4 exam and it helped me score 112 UMS."

Karim El-Sayed
IAL A2 Biology · Egypt · 112 UMS, Unit 4

"I used the pack for both AS and A2 — it saved me a lot of time searching and decoding mark schemes."

Nur Izzati Rahman
IAL Biology AS & A2 · Malaysia

"Latest exam series included, neatly organised. The answers are clear and map each mark-scheme point, so I knew exactly what to write."

Chen Yi-Ting
IAL Biology · Taiwan

"I used to cover the answers and try them myself — it helped a lot. I am weak in maths, and the teacher solves maths problems in detail, which helps me understand."

Khalifa Al-Nahyan
IAL Biology · United Arab Emirates
4.5-star rating from Chem Bio IAL A2 Biology students

The messages that arrive on results day

Sent to Mr. Hosni on WhatsApp when grades came out — tap any message to enlarge.

WhatsApp message from a student sharing their exam results with Mr. HosniStudent WhatsApp message thanking Mr. Hosni after results dayWhatsApp screenshot of a student reporting their gradeResults-day WhatsApp message sent to Mr. HosniWhatsApp message from a student celebrating their gradeStudent message with exam results shared on WhatsApp

One repeatable system for A2 Biology Units 4, 5 and 6

Each A2 Biology topic follows the same disciplined loop — the routine behind the results above.

1
Watch the Unit 4–6 lesson video
2
Skim the A2 Biology notes
3
Sit the topic progress quiz
4
Practise real WBI14–WBI16 past-paper questions
5
Compare your work with the model answers

About this course

The IAL A2 Biology Instant Access Course covers Edexcel International Advanced Level Biology Units 4, 5 and 6 (WBI14, WBI15 and WBI16) with pre-recorded video lessons in specification order, revision classes, eBooks and notes in mark-scheme language, topic quizzes with flashcards and progress tracking, solved Unit 4 and Unit 5 past papers, Unit 6 practical training, and WhatsApp support from Mr. Hosni — teacher of a Pearson Edexcel Outstanding Learner Award winner (highest IAL Biology mark in Kuwait). Full A2 access costs $250 for two years on all devices, delivered by email within minutes of payment, and works for the January, June and October sessions. Single units start at $100; the full six-unit A-level course costs $400.

A2 questions, answered before you ask

Who should take this A2 course?

Students sitting Edexcel IAL Biology Units 4, 5 or 6 — whether you're moving up from AS, resitting a unit to lift your UMS average, or self-studying the full A2 year. Everything is recorded, so you can start any unit at any time and rewatch as needed.

Which units make up A2 Biology?

Three: WBI14 (Energy, Environment, Microbiology and Immunity), WBI15 (Respiration, Internal Environment, Coordination and Gene Technology) and WBI16 (Practical Skills in Biology II). Together with the AS units they complete the full IAL Biology A-level.

How is the A* awarded in IAL Biology?

You need a grade A across the full A-level and a high UMS average across Units 4 and 5 — which is why those two units get the heaviest technique training in this course. Strong Unit 4 and 5 scores are what separate A from A*.

What is included in the full A2 course?

Complete Unit 4 and 5 video lessons and eBooks, Unit 6 practical training, extra revision classes, solved past papers written in examiner wording, technique training for synoptic and long-answer questions, quizzes with flashcards and progress tracking, 2 years of access, and WhatsApp support.

Is this for Edexcel IAL specifically?

Yes. The course follows the Edexcel International Advanced Level Biology specification (WBI14–WBI16) exactly. It is not designed for Cambridge International or UK-domestic A-level Biology.

Is it live or recorded, and when do I get access?

Fully recorded with instant access — your login is emailed within minutes of payment and lasts two years on all devices. Mr. Hosni also runs separate live weekly IAL classes if you want a fixed timetable.

Can I resit just one A2 unit?

Yes. Edexcel IAL lets you resit individual units in the January, June or October sessions, and only your best UMS counts. That's exactly what the single-unit packages are for.

What about the Unit 5 scientific article?

It's covered for you, every session. Mr. Hosni fully explains the pre-released article and provides a complete list of predictable questions that are very likely to appear in your actual exam — with model answers in mark-scheme language, a clear summary, and clarifications of every difficult concept.

Where do A2 students lose the most marks?

Synoptic questions answered without linking back to AS content, data questions where the figures are described rather than analysed, and Unit 6 answers missing the experimental-design vocabulary. Each of these has dedicated training in the course, taught from real past papers.

Is there a refund policy?

Yes — the refund policy is published on the Chem Bio membership site. If you're unsure, watch the free lesson first or message Mr. Hosni on WhatsApp before purchasing.

Not sure which units you need?

Tell Mr. Hosni your current UMS, target grade and exam session — he'll advise honestly whether to take the full A2 course, a single unit resit, or the complete six-unit package. He replies personally.

Finish IAL Biology the Way You Meant to Start It.

Units 4, 5 and 6 — videos, revision classes, notes, solved papers and direct WhatsApp support, calibrated to the A* standard.

$250 $350 Save $100 · one payment · 2 years of access

Start A2 Biology Now
Secure payment · Instant access after purchase
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