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Three photorealistic circular pies sit side-by-side on a clean neutral background, each pie made from photographic classroom slices that read as a single lesson broken into start/settling, teach/lecture, group-work/practical and end/closing moments. Left (30 min) shows young children with ~13% start, ~53% teaching, ~20% group work, ~13% end; middle (40 min) mixes elementary/secondary ages with ~12% start, ~50% teaching, ~28% group work, ~10% end; right (60 min) features older students and hands-on projects with ~12% start, ~45% teaching, ~33% practical, ~10% end. Soft natural lighting, shallow depth of field, realistic skin tones and textures, high-resolution editorial composition, no text or labels.
  • 30-minute lesson: Start 4 min, Teaching 16 min, Group work 6 min, End 4 min.
  • 40-minute lesson: Start 5 min, Teaching 20 min, Group work 10–12 min, End 3–5 min.
  • 60-minute lesson: Start 7 min, Teaching 25–30 min, Practical or project 20 min, End 3–5 min.

Adjust the proportions by age and subject. Young children need shorter work blocks and more transitions practice.