Foundation lessons
A free AI foundation
Original lessons in plain language. They are not third-party courses. They point at the catalog for current sites and models instead of freezing prices or vendor claims in the prose.
01 · 8 min
What AI is — and what it is not
A plain-language map of the field so chatbots, models, and automation stop sounding like the same thing.
02 · 10 min
How language models work (without the mystique)
Tokens, context windows, and why “the model said” is not the same as “the model retrieved.”
03 · 10 min
Prompts, tools, and agents
How to get useful work from an assistant, and when you have actually built a workflow rather than a chat.
04 · 8 min
Choosing a model without hype
A checklist that survives leaderboard screenshots: task, context, license, where the data goes, and a real trial.
05 · 8 min
Privacy, cost, and when not to use AI
A judgment pass before you paste a document or wire a model into a real workflow.