120+ questions across 9 AP Chemistry unit worksheets, aligned with the 2025–2026 CED. Every unit follows the same proven format:• Free-response questions with multi-part calculations and lab-contextualized scenarios• A data-driven stimulus question set — 2–3 linked questions sharing a data table or figure, matching the format used on 30–40% of the AP exam• Multiple-choice questions testing application, not recall• Scratch work page for student calculations WHAT MAKES THESE DIFFERENT:• Stimulus-