The Method
Every Cognosco course rests on one finding and one answer. The finding is forty years old. The answer is the Lighthouse Coach.
Bloom’s Two Sigma
In 1984, educational psychologist Benjamin Bloom reported a striking result: students who learned one-on-one with a tutor, under a mastery-learning discipline, performed about two standard deviations above students taught conventionally. The average tutored student outperformed roughly 98 percent of the classroom group.
Bloom called the challenge of reproducing that result the “two sigma problem”: the method worked, but one expert tutor for every learner was too costly and impractical to scale. For four decades, the best-known way to learn stayed the least available — reserved for the few who could put a tutor in the room.
That problem is why Cognosco Learning exists in its present form. Since 2002 we have taught in the room, one group at a time. The question Bloom left behind is the one we set out to answer: how does every learner get the one-to-one discipline — without the one-to-one cost?
One Coach, One Learner at a Time
The Lighthouse Coach is our answer to Bloom’s problem: an agentic AI coach that works the way Bloom’s tutors worked — Socratically, one learner at a time. It asks the question, listens to the answer, names the misconception it hears, affirms what is right, and asks the next question. It does not advance a learner merely because time has passed; the learner must explain, apply, and prove each idea. Mastery is the standard.
That discipline now runs across the whole Signature Series — 56 Agentic Socratic AI Learning courses live today at $195 each, alongside Cognosco’s 100 Live Learning courses: over 1,200 hours of learning, every hour of it held to the same method.
Bloom’s figures belong to Bloom’s research, not to our catalog. We cite them because they name the standard honest learning should aim for — not because Cognosco claims its courses have been measured at two sigma.
Hear the method work
One full concept, coached end to end — free. Meet Sutton, take the sample, and judge the method the way every learner does: by working with it.