Arkham
Lesson 5 · Practice

Capstone: Explain Something You Know

Put it all together. Teach a concept to a curious beginner in under 90 seconds.

This is the capstone. You're going to pull everything from the previous four lessons into a single short talk.

Before you record, pick your topic

Choose something you genuinely know well and enjoy talking about. The quality of your talk will track the quality of your interest — nobody sounds confident explaining something they don't care about.

Your checklist

  • Open with a hook — a question, a surprising claim, or a one-sentence story.
  • Body: one central idea, defended with one or two specific examples.
  • Close: restate your idea in a new form, then stop.
  • Aim for 140–170 WPM, pause after your key sentences, and watch the filler words.

A tip before you hit record

Take five seconds of silence before you start. Take a breath. Think about the first sentence out of your mouth. Most people start recording the instant the button turns red and then fumble the open; don't do that to yourself.

You're ready. Go.

Your prompt

“Pick a topic you know well — a hobby, a part of your job, a book, anything — and explain it to a curious beginner in under 90 seconds. Use a clear open, one central idea, and a deliberate close.”

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