IB ESS Drilling Guide (SL and HL): Paper 1 Case Data, Paper 2 Essays and a 12-Week Plan

TUTORZONE EXAM DRILL GUIDE · IB ENVIRONMENTAL SYSTEMS AND SOCIETIES (FIRST ASSESSMENT 2026)

Built on the IB Environmental systems and societies course first assessed in 2026: SL external assessment is three hours for 75% (Paper 1 one hour/25%, Paper 2 two hours/50%) with the individual investigation worth 25%; at HL it is 4.5 hours for 80% (30/50) with 20% internal. This page is the drilling method only – structure, drill order (by topic, by year, mark scheme), a 12-week timetable, pacing, the usual mark losses and the error log. For questions with answers use the original mock papers linked below.

Paper 1 technique: with a case study, first copy out the key figures (area, rates, concentrations, prices), then calculate and always give units. Evaluation answers should cover ecological, economic and social dimensions and quote the data. At SL allow about 1.5 minutes per mark; at HL the material is longer, so skim it before answering. HL candidates should be ready with the three lenses: environmental law (compensation and regulation), environmental economics (PES, carbon pricing, externalities) and environmental ethics.

Subject-specific weighting for this timetable: The twelve weeks follow the shape of the two papers: the first five are Paper 1 case data only, two invented case studies a week, with the copy-calculate-evaluate three-step written on one page and timed at about 1.5 minutes per mark at SL; weeks 6-8 move to Paper 2 Section A short answers and data questions until the command word tells you how many layers are wanted at a glance; weeks 9-11 are Section B essays, one a week, forced into three paragraphs – ecology, economics, social – plus a trade-off conclusion; the final week is whole papers under time (3 hours at SL, 4.5 at HL) and the internal investigation written up. HL candidates run the same question through the law, economics and ethics lenses once each.

Three columns, never a copy of the question: data (copied in full, units and time base right), calculation (formula and intermediate steps shown, answer checked backwards against the data), evaluation (a trade-off, and the figures from the stimulus quoted in support). Three hits in one column in a week means next week drills that column only – the mark scheme wants a judgement and a trade-off, not one sentence of upside for each side.

ESS is first assessed in 2026, so there are very few official past papers and you cannot drill by year. Put the weight on the specimen questions in the official subject brief and on invented case studies: run the same data set through three command words (describe, explain, evaluate) rather than ten years of old papers. School papers and publisher question banks are useful extras, but check the data still maps onto the eight syllabus topics.

Is this page a mock paper or a drilling guide?
This is the IB ESS drilling guide: assessment structure, drill order, a 12-week timetable, pacing, common mark losses and the error-log method. For questions with answers, use the IB ESS mock papers linked under Related.

By topic or by year first?
By topic. Eight to ten years of the same topic back to back is what exposes repeating errors; going straight to whole papers just repeats the same batch under time pressure.

How should the error log be written?
Do not copy out questions. Per error record four things: question reference, which step failed (concept, wording, calculation), what the mark scheme requires, and the correct action next time.

Paper 1 uses a previously unseen case study – there are no past cases to drill. How should I practise?
Invent the cases but copy the official format: one data set (area, rate, concentration, price, population) plus four or five questions running from describe to evaluate. What you drill is the fixed move – copy the data, calculate, evaluate – so swap the ecosystem (wetland, forest, city) and repeat the same move; unseen data then cannot knock your pacing off.

Do HL candidates need separate practice for the environmental law, economics and ethics lenses?
Yes, but on the same question. Take one evaluation question and write a paragraph with legal tools (compensation, regulation), one with economic tools (carbon price, payments for ecosystem services, externalities) and one with an ethical stance (intrinsic value, intergenerational equity), then compare why the three conclusions differ. Learning the three lenses as separate definitions still produces an evaluation with no trade-off.

Related: IB ESS Paper 1 original mock (invented case data, with worked calculations and evaluation) · Paper 2 original mock (Section A short answers plus Section B essays, with answers) · practice area