17 complete IB DP Chemistry lessons covering Structure 1: Models of the Particulate Nature of Matter — states of matter, the mole concept, ideal gases, and the atomic model through emission spectra and (HL) the ionisation-energy evidence for electron shells and subshells.

This is the SAME 113-lesson course as my unit-by-unit edition, reorganized by 2025-guide SYLLABUS THEME instead of teaching order — built for topic revision, interleaved practice, and mock-exam preparation.

EVERY LESSON INCLUDES 8 RESOURCES:
• 13-slide presentation with full teacher speaker notes
• Worksheet using IB command terms, exact mark totals (≤25 marks per period)
• Homework task
• Scaffolded support task for students who need more structure
• One-page landscape knowledge organiser
• Key terminology sheet
• Teacher answer sheet with complete mark schemes and rubrics
• Self-contained interactive HTML lesson — works fully offline, with an embedded self-marking quiz that matches the answer sheet exactly

WHAT MAKES THIS DIFFERENT:
• Built for the 2025 IB Chemistry guide (first exams 2026), SL + HL combined, with every HL-only section and HL-extension content clearly flagged
• Diagrams are purpose-drawn for the exact syllabus scope — mechanisms, energy profiles, titration curves, spectra and cell diagrams — not generic stock images
• Photographs are openly licensed (Creative Commons/public domain) with attribution included in the resource
• Every worksheet has exact, verified mark totals; extended-response rubrics are written independently of the student-facing questions, so nothing leaks the answer
• Consistent lesson structure throughout: retrieval starter, worked examples, marked practice, and a challenge extension

This is an unofficial resource. It is not endorsed by or affiliated with the International Baccalaureate Organization. “IB” is a trademark of the IBO, used here only to indicate compatibility.