A lively 60 to 90 minute photography lesson that helps students understand aperture, f numbers and depth of field through quick decisions, a practical indoor Bokeh Lab and a structured evaluation. This complete photography lesson introduces aperture without overloading students with technical writing. Students begin as blur detectives, learn the reversed f number pattern and then test several settings using an indoor miniature scene. The pack includes: • 11-slide editable teaching PowerPoint • Two-page editable A4 student handout • Print-ready PDF copy of the handout • PDF copy of the teaching slides • Teacher timings and answers in the PowerPoint notes • Practical task that works indoors • Tier 1, Tier 2 and Tier 3 vocabulary • Built-in support, troubleshooting and stretch work The lesson suits Key Stage 3, Key Stage 4, GCSE introductory photography, UAL Level 1 or Level 2 and alternative provision settings. It works with DSLR or mirrorless cameras. Students can use aperture priority mode where appropriate. Learning outcomes: • Explain what aperture controls • Connect small and large f numbers with depth of field • Produce shallow and deep depth of field photographs • Evaluate a photograph using accurate subject vocabulary All photographs and visual assets in this resource were created specifically for this commercial pack. No school branding or student work appears in the files.