eBook
A2.1 Origins of cells - 5 Essential revision points
This is a '5 Essentials' revision (or review) sheet for Topic A2.1 Origins of cells. It will help students remember the five most important details required for the topic. SL and HL concepts in the white...
eBook
A2.2 Cell structure - 5 essential revision points
This is a '5 Essentials' revision (or review) sheet for Topic A2.2 Cell structure. It will help students remember the five most important details required for the topic. SL and HL concepts in the white...
eBook
A1.2 Nucleic acids - 5 essential revision points
This is a '5 Essentials' revision (or review) sheet for Topic A1.2 Nucleic acids. It will help students remember the five most important details required for the topic. SL and HL concepts in the white...
Activities
Reproduction in flowering plants (2025)
This lesson begins with a short screencast activity to help students draw the structure of an idealised animal-pollinated flower. In nature the shape of flowers is very varied and many flowers have a...
eBook
A3.1 Diversity of organisms - student friendly summary
Blue text shows extra clarification or guidance. Guiding questions The simple definition of a species, as used by Linneaus, groups organisms by shared traits and is listed in the guide. The guide also...
Activities
Gas exchange in plants - model answers
These are suggested model answers for the activity Leaf structures and drawing worksheet As model answers they don't cover all the possible options for correct responses, but they provide a very good...
Activities
Evolution & Hardy-Weinberg equation (2025)
Students investigate industrial melanism using an excellent online simulation, as well as observing gradual directional selection in moth populations. The use of peppered moths has been contested, by...
Activities
Hardy Weinberg - model answers
The document below shows model answers to the questions on the Hardy-Weinberg calculation on moths found on the page Evolution & Hardy-Weinberg equation (2025) Teachers can control access to these answers...
ATL in Biology
Biology roadmap for 2025 exams
All the topics, the organising themes and the levels of organisation are shown in this table. There are forty topics to navigate so it is important to see the big picture. This is a great place to look...
ATL in Biology
Additional HL Free
These additional HL topics contain the following: Resources for teaching the new IB Biology Guide are organised by topic Use the left hand menu to choose your topic. Individual learning activities are...