About Conceptual

Conceptual teaches one Concept at a time: a short lesson from a teacher, then questions that find what you already know and skip it.

Who

Conceptual is built by Jeremy Langley, with help from the family, contributors, and strangers-turned-collaborators named below.

Teachers bring the Concepts. Guides arrange them into Paths toward a goal. Students learn them, one question at a time, in whatever order their own knowledge calls for.

Why

Education keeps costing more and taking longer for about the same result. Conceptual goes the other way: short Concepts, research-backed questions, and a quiz that starts in the middle so you never re-answer what you already know.

Every second removed from learning a Concept is a second handed back to you. We never nag you to come back. When you stop needing us, that is the product working.

Thank you

Family

Gale Langley: Long-suffering wife of an idealist.
Joseph, Linda, and Jeannine Langley: For their moral and financial support, trusting me even early on when (at first) they didn't know what I was building.
Nathan, Kyle, and Micah Langley: Our kids. This is whom I built this for.

Education industry

Rising rates.
Longer education times for similar results.
University entrance rates lagging population increase.

You made this necessary.

Contributors

Amelie Schreiber: Idea: taking expert interactions and working them into the current (2026) Teacher and Guide pages.
Abel Kodjo Atsou: Code changes and ideas.

Translations (French, Simplified Chinese, Spanish, Russian), ongoing.

Mobile: ideas for fixing the search bar, and the layout for the mobile app.

Videos in an embedded player (when possible).
Askar Abyikhayev: Early human resources on a $0 budget: bringing on board Abel, and others.

Alerting me to the paper-university industry, its role, and its consequences.

Questions app plumbing in late 2024.

Frontend work in 2025.
@Thor on the Discord Python channel: Idea: multiple choices for the same Concept in the evaluation phase.
Bidi at Fort Worth Code and Coffee: Idea: “Why don't you use these marketing tools?” and a list of them. So transformative, knowing what's out there for marketing.