What the Cell
IBDP Biology · first assessment 2025

DP Biology

Everyone starts on the SL path. HL students then continue with AHL, for 250 hours in total.

Course resources

The textbook

Biology for the IB Diploma

Clegg, Davis & Talbot · 3rd edition · Hodder, 2023

40 chapters. Each subtopic page gives the printed page number for every syllabus statement.

Weeks 1–39

SL path →

Starts with Body Systems and ends with Ecosystems.

7 units · 39 weeks · 130 hours
Weeks 40–62

AHL path →

Starts with AHL: Body Systems and ends with AHL: Ecosystems.

7 units · 23 weeks · 120 hours

 See the full course map →

This week’s questions

This week’s questions will appear here.

Assessment and skills

Internal Assessment

Coming soon

Extended Essay

Coming soon

Collaborative Science Project

Coming soon

Nature of Science

70 examples

Theory of Knowledge

70 questions

Practical scheme of work

70 practicals

Skills

Methods, tools, maths

Data questions

By unit, SL and HL