Show HN: Teacher Planner – A digital planbook with AI tools for teachers

Hi HN, I built Teacher Planner to help teachers organize lessons and prepare classroom materials in one place.

The digital planbook brings together lesson plans, units, schedules, and curriculum standards, with day, week, and month views, read-only sharing, and configurable print layouts. It supports English and Chinese, and you can try the planner as a guest without creating an account.

Alongside the planner, there are five AI tools: a lesson plan generator, worksheet generator, multiple-choice quiz generator, text rewriter, and writing feedback tool. These help produce drafts that teachers can review and adapt for their classes.

I'd appreciate feedback from teachers and people building education software. Which parts of your planning and material preparation still take the most time, and where do existing tools fall short?