Write a lesson plan for teaching SEO using Socratic questioning. Duration: {{lesson_duration}}. Learning objective: {{learning_objective}}. Tone: {{tone}}. Structure as numbered steps with action title, instructions, expected outcome, and common pitfalls. Cover Opening, Instruction, Practice, and Closing phases. Include Differentiation Notes and Reflection Questions. Maximum 600 words. All recommendations must be specific to {{education_level}} students.