Both SL and HL students gain an understanding of the complexities of environmental issues, solutions, and management during the ESS course. Common features of the course at both SL and HL include:
1. A concept-based syllabus that promotes holistic thinking about strategies to address environmental issues (discussed below)
2. A foundation topic (Topic 1) that introduces and explores the key concepts
3. A common internal assessment (IA)
4. The collaborative sciences project, where students work with other students across all the IB Sciences to explore a real-world problem.
The SL course provides a fundamental understanding of ESS and experience of the associated skills. The HL course includes HL-only understandings, underpinned by an exploration of ethical, legal and economic issues relating to the environment (the ‘HL lenses’). The additional content within topics 2-8, along with the HL lenses, allow HL students to analyse problems at greater breadth and depth, with additional potential for higher-level evaluation. For HL students, the HL extension lenses apply across both SL and HL content. Suggested connections of the HL lenses to topics 1 to 8 are made throughout the course.