[ GLOSSARY ]

What is retrieval-augmented generation?

Facts as of Oct 18, 2026Last reviewed Oct 19, 20261 min read

Definition

AI concepts

Retrieval-augmented generation

Retrieval-augmented generation (RAG) is a technique in which an AI first retrieves relevant documents, such as class materials, and then answers using them, often with citations.

Why it matters for schools

Grounding an AI in the right material can cut errors: in a high-school math study, an AI given the teacher's solution in its prompt rarely erred, while the unguarded version often did. Retrieval can still miss the right passage or cite it loosely, so students should open the cited source and check that it says what the answer claims.

[ FAQ ]

Questions and answers

What is RAG in simple terms?

An AI looks up relevant documents first and answers from them, often citing them.

Does RAG stop AI hallucinations?

It reduces them when the right material is found, but it does not eliminate them.

Why does RAG matter for schools?

It can keep answers tied to approved class materials instead of the open web.

[ SOURCES ]

Sources

Facts checked Oct 18, 2026.

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[ Narb LLC ]

Nexus is a school AI platform by Narb LLC · 16192 Coastal Hwy, Lewes, DE 19958

© 2026 Narb LLC

NEXUS

Nexus. The AI your school can approve.

[ Support ]

[ Narb LLC ]

Nexus is a school AI platform by Narb LLC · 16192 Coastal Hwy, Lewes, DE 19958

© 2026 Narb LLC