We make one shared lesson a day, a dictionary for developers, and cards for the heaviest days. We say only what we can show.
Some of what we make helps people learn. Some of it helps people through loss. All of it should be right.
One shared lesson a day, taught by Kelly. Open to everyone and openly licensed under CC BY 4.0.
A dictionary and lesson API for developers who build with language.
Kelly is the teacher inside The Daily Lesson and the reader inside HELD. She is AI-generated, and we always say so. In HELD she reads each card word for word; AI never rewrites a card.
of our AI-generated lesson titles had a provable defect when we audited them with code alone.
AI helps us make lessons, and AI makes mistakes. We use outside AI models, and we say so.
So we are building a checking step that reads our work before a learner does. It answers plain questions about the text, such as
“Does this lesson teach its title?”
“Is this in the right language?”
It never writes or rewrites anything. Anything uncertain, and anything about safety, goes to a person.
We measure our own mistakes and say so. The number on the left is the one we are working to bring down.
Lesson of the Day, PBC was founded by Nicolette Rankin, co-founder of Open English (about 2 million students; Harvard Business School case N9-814-020, 2014).