IB DP ESS 3.1 Biodiversity and Evolution - Teaching Notes & PowerPoint 2026

IB DP ESS 3.1 Biodiversity and Evolution Teaching Notes & PowerPoint 2026

This comprehensive teaching and revision resource covers the Biodiversity and Evolution topic (Topic 3.1) from the IB Diploma Programme Environmental Systems and Societies course. It is designed to serve two purposes: as structured teaching notes for instructors and as focused revision material for students preparing for ESS assessments.

Editable PowerPoint Version Included

In addition to the printable PDF version, this resource includes an editable PowerPoint presentation that mirrors the full content. Teachers may customise text, reorganise slides, embed images, videos, or interactive elements, or adapt the sequence for classroom delivery or blended learning environments. This flexibility makes the material ideal for both in-class instruction and online study.

What Makes This Resource Useful for ESS Teachers

Follows the Subject Guide Directly
• Content is organised clearly according to the IB ESS subject guide.
• All required assessment statements for the Biodiversity and Evolution topic are covered sequentially.
• Ensures that essential syllabus content is thoroughly addressed.

Helpful for New Teachers
• Provides a clear and logical framework for teaching biodiversity and evolution principles if you are new to ESS.
• Can be used confidently as your core teaching notes, saving preparation time and effort.

Dual-Purpose Design
• Use the material as your own reference when planning lessons.
• Provide to students as structured revision notes.
• Explanations are accessible for independent study while also detailed enough to support effective teaching.

Content Included

• Definitions of biodiversity and its ecological significance
• Levels of biodiversity: genetic, species, and ecosystem diversity
• Measures and indices of biodiversity
• Threats to biodiversity from human activity and natural change
• Natural selection and variation within populations
• Mechanisms of evolutionary change and adaptation
• Case study examples illustrating biodiversity and evolution interactions
• Visual diagrams, charts, and models to support concept understanding
• Key terms and definitions highlighted for focused revision

This resource includes structured summaries and visual supports to reinforce conceptual clarity and support confident lesson delivery and exam preparation.

This is a straightforward teaching tool that presents the Biodiversity and Evolution topic in an organised, curriculum-aligned format, making essential ESS content easy to teach and revise.