Help your students master differentials and linear approximation with this clear, scaffolded, and engaging lesson designed for Year 11 Maths Methods / introductory calculus. This resource builds understanding from first principles through to application, helping students confidently use dy=f′(x)dx to estimate changes and approximate values. 🔹 What’s Included: ✔ Step-by-step PowerPoint lesson (intro → worked examples → applications) ✔ Visual diagrams (tangent line, dxdxdx, dydydy, and c