Hello,
I’m Theo.
I’m your animated guide to practical English. We’ll take confusing words, everyday examples and a little practice — one small step at a time.
The Pocket Teacher is for people who already know some English and want to use it with more confidence. You can pause, repeat and try again.
Let’s try a lesson ↗A character. A clear purpose.
Theo is a fictional, animated character. The lessons are learning resources, not an accredited course or a language certificate. Level labels are a guide to help you choose what to practise.
Our aim is simple: clear explanations, useful examples and answers that help you understand.
How to use our lessons
Each lesson focuses on one useful difference: examples first, then practice with explanations. Level labels are suggestions, not a formal assessment. Theo is a fictional guide, not a real teacher with qualifications.
We use AI tools to help create and illustrate learning materials. The lessons can contain mistakes; if you notice an unclear explanation or an answer that needs attention, send us the page and your feedback.
You can use the explanations and answer keys without creating an account.