Teachi: AI lesson planner for tutors (teachi.space). Tutors plan lessons, build worksheets and set homework in one workspace. I built an AI Lesson Planner that generates Cambridge-standard plans with OpenAI, a custom Tiptap editor where teachers highlight any passage and rewrite it with AI, and an importer that turns old PDF, DOCX and scanned lesson plans into editable content via GPT-4o vision. Autosave safely merges AI output with in-progress edits. 600+ teachers have signed up.