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There are 20 main categories, or subjects, of lessons on The Blue Tree. First five are about the English language, the next ten are about general interest, and last five relate to personal development.Â
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chronological catalogue
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Secrets of Learning Languages with Lydia Machova
Do you know any polyglots? How many languages would you like to speak? What are the secrets of learning languages? Find out in this lesson based on a TED talk by Lydia Machova.
Ergonomic Workplace
Henry Ford
What adults can learn from kids
Are You a Giver or Taker
Participating in Meetings
Work-related stress
How to be busy in English
Sadness is Darkness
Presenting skills: outline your talk
Feynman Study Technique
How to write business emails – email styles
How to talk about sleep
Present Perfect or Past Simple
Czy wiesz jak zbudować zdanie, które skupi się na rezultacie czynności, a nie jej samej po angielsku? W tej lekcji dowiesz się, lub sobie przypomnisz, jaka jest różnica między czasami gramatycznymi: Present Perfect oraz Past Simple
How adults learn: ANDRAGOGY
Do children and adults learn in the same way? learn how adults learn from this lesson about andragogy.

































