About the NGSL

Created by three researchers

The NGSL was developed by Charles Browne, Brent Culligan, and Joseph Phillips and released in 2013. Their aim was to identify the most useful general English vocabulary for learners using modern corpus evidence and clear pedagogical principles.

Built from a large, modern corpus

The list was developed using a carefully selected 273-million-word subsection of the Cambridge English Corpus. This subsection included modern written and spoken English from a variety of registers, providing a substantially broader evidence base than was available to earlier vocabulary-list researchers.

From West’s GSL to the NGSL

Michael West’s General Service List, published in 1953, was a landmark attempt to identify a core vocabulary for learners of English. It remained influential for decades, but its underlying corpus was small and dated by modern standards. The NGSL builds on West’s central insight—that carefully selected high-frequency vocabulary can make learning more efficient—while using a much larger modern corpus and a clearer definition of what counts as a word.

Why high-frequency vocabulary matters

English contains an enormous number of words, but they do not occur equally often. A relatively small group appears repeatedly across everyday texts and conversations. Learning these high-frequency words first helps learners understand more of what they read and hear, encounter familiar vocabulary more often, and make efficient use of study time. A general-service list is therefore a foundation, not a complete vocabulary: learners will also need academic, professional, technical, and interest-specific words according to their goals.

Seven progressive learning bands

For teaching and learning, the NGSL is organized into seven bands of 400 words. The bands provide manageable stages for planning study, checking vocabulary coverage, and adapting learning materials. Band 1 contains the highest-frequency group, followed progressively by Bands 2 through 7.

How to cite the NGSL