About Skepsis

σκέψις (skepsis, “looking closely”)

Skepsis teaches the Greek hiding in everyday English, in lessons short enough for a coffee break. It started as a way to teach a busy team in Texas, so every word comes with a Texas example. Made by Ion Petropoulos.

What's inside

11 units, 57 word roots and 36 myths and ideas: tele, photo and graph; astronaut and petroleum; ethos, pathos and logos; hubris and nemesis; the Stoics; and a round of “Is it Greek?” (rodeo, maverick, barbecue).

How it teaches

Guess first. Each lesson starts with a word you haven't learned. Guessing before you're told helps it stick.
Word families. Learn a root with its family, then decode words you have never seen.
Spaced review. Words come back after 1, 3, 7, 14 and 30 days.
No punishment. No hearts, no lives. Weekends never break a streak.

The research behind these choices, with sources, is in RESEARCH.md.

Learn from your AI agent

Skepsis ships an MCP server, so Claude, Cursor or any MCP-capable agent can tutor you with the same lessons and spaced review:

claude mcp add skepsis -- npx -y github:ionpetro/skepsis

Open source

Code and content are MIT-licensed on GitHub. Corrections and new words are welcome.

Privacy

No accounts and no sign-up. Your progress stays in your browser. The site counts visits and lesson results anonymously with PostHog so we can see which words are hard and whether lessons help.

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