Lessons

Hello,

Hello My Dear Learner!

It’s great to see you here, on The Blue Tree. It means that you – like me – enjoy learning about the world, people and ideas.

There’re hundreds of lessons waiting for you to explore. Use the simple or interactive search tools to find something interesting. You can also browse through the catalogue of lessons below.

Please remember that I am here to help you. If you need any help or if you find a bug or mistake, let me know at hi@thebluetree.pl

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LATEST LESSONS

Check out the latest lessons added to The Blue Tree.

List of Subjects

Browse through the subjects.

Business English

Business
English

English grammar

English
grammar

Everyday English

Everyday
English

Tests and Quizzes

Test &
quizzes

Learn more words

Learn more
words

Culture

Culture

Entertain Yourself

Entertain
Yourself

Health and fitness

Health &
fitness

Wise Quotes

Wise
quotes

Science stuff

Science
stuff

Surprise me

Surprise
me

The Arts

The Arts

Travelling and nature

Travel &
Nature

What do you think

What do 
you think

Man and
Society

Better Communicator

Better
communicator

Better Writer

Better
writer

How to learn

How to
learn

Learn from TED.com

Learn
from TED

Personal Productivity

Personal
productivity

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MY ENGLISH DICTIONARY

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Chronological Catalogue of Lessons

Look through the chronological catalogue of all the lessons on The Blue Tree.

Make yourself valuable, not irreplaceable

Make yourself valuable, not irreplaceable

Why is it better to make yourself valuable than irreplaceable at work? Learn the answer to this intriguing question in another lesson based on the HBR Management Tip.

The Art of Balancing Stones

The Art of Balancing Stones

Czy słyszałeś kiedyś o czymś takim jak ustawianie kamieni? Jak dowiesz się z tej lekcji, to naprawdę trudna, ale i piękna, forma sztuki.

Dan Pink 4.26 Drucker memo

Dan Pink 4.26 Drucker memo

Learn how Drucker Memo can help you make better decisions. This lesson is based on Daniel Pink’s video.

Can e-bikes transform our cities?

Can e-bikes transform our cities?

Can e-bikes transform our cities? Financial Times prepared a very interesting report on the impact this new type of bicycle has on cities and commuting.

WHEN by Daniel Pink

WHEN by Daniel Pink

Learn when to do your most important work taking account your circadian rhythm. This lesson is based on a whiteboard animation about Daniel Pink’s book “When”.

Atomic Habits by James Clear

Atomic Habits by James Clear

Learn how to make your habits stick by making them obvious, easy, attractive and satisfying. This lesson is based on James Clear’s book Atomic Habits.