The Beatles did not set out to teach English - but they have been brilliant ambassadors for the language. Abbey Road, for example, contains over 90% of the 2000 words 'considered to be of the greatest 'general service' to learners of English'.
Why were The Beatles so effective in communicating the language?
Their early experience of teaching in a foreign language environment (Hamburg) may have played a role. But I think that age and cultural attitude were the crucial elements. The Beatles spoke to and for the younger generation. And for the first time that younger generation was shaping popular culture.
Language Level: Intermediate/Upper Intermediate (CEFr B1/B2/C1)
TESOL resources include:
text & audio graded for English language learners
worksheets with teaching notes
quizzes (with recorded responses & answers).