Lesson Plan

• Describe the subtractive colour model underlying CMYK and its effect on printed colour.
• Explain each stage of the CMYK separation workflow from image capture to plate making.
• Apply basic halftone screening concepts (frequency and angle) to avoid moiré patterns.
• Evaluate equipment and ink‑density choices for quality control in a printing process.

• Projector or interactive display
• Computer with colour‑management software (e.g., Photoshop)
• Sample printed CMYK sheets or plates
• High‑resolution scanner or digital camera for image capture
• Whiteboard and markers
• Handout summarising the CMYK workflow

Begin with a quick visual of a full‑colour magazine page and ask students how many inks are actually used to create it. Recall the additive RGB model they have studied and set the success criteria: students will be able to trace the CMYK workflow and explain why each step matters.

1. Do‑now (5') – Students answer the four quick revision questions on CMYK theory displayed on the board.
2. Mini‑lecture (10') – Explain the subtractive colour model, the CMYK formula and why “Key” (black) is essential.
3. Software demonstration (10') – Show conversion of an RGB image to CMYK, channel separation and setting screen frequency/angle.
4. Guided activity (15') – In pairs, learners use the provided image to generate CMYK channels, apply halftone screening, and discuss registration challenges.
5. Whole‑class discussion (5') – Review common colour‑variation issues and equipment choices (scanners, plate makers, offset press).
6. Exit ticket (5') – Each student writes one key takeaway and one lingering question on a sticky note.

Recap the end‑to‑end CMYK separation process, highlighting how each stage influences final print quality. Collect exit tickets to gauge understanding, and assign a homework task: students must select an image, create a CMYK workflow using the software, and submit a screenshot of the four channels with their chosen screen settings.