This critically important discovery has made it possible for everyone to master English in a scientifically efficient way.

Our Core 3000 courses collectively contain over 3,700 of the most-used words in English derived from in-depth scientific analysis of the Corpus of Contemporary American English and the British National Corpus.

The extra 700+ words come from specific words having multiple important meanings.

Our program is divided into 3 levels:

Core 3000 – Beginner [CERF: A1–A2]
Core 3000 – Intermediate [CERF: B1–B2]
Core 3000 – Advanced [CERF: C1–C2]

The Corpus of Contemporary American English (COCA) is composed of over 1 Billion words and is evenly divided between six genres: TV/movies, spoken, fiction, magazine, newspaper, and academic. COCA is considered to be “the only large and ‘representative’ corpus of American English” and is “the most widely-used corpus of English.”

The British National Corpus (BNC) is the world’s largest corpus of spoken and written British English. It has 100 Million samples of written and spoken British English from a wide range of sources.

Slang English (Beginner – Top 300+ Terms)

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