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AI learning platform that builds a personalized curriculum for any subject

Record ideas by voice, then send usable notes to your existing apps

Timed breathing exercises with adjustable audio, visuals and haptics

A workshop whiteboard with polls, timed exercises, dot voting, version history, and offline editing.

Short programming tutorials beside exercises and references

Free guided meditation, breathing exercises and courses without a premium tier

A linked-thought knowledge graph for capturing notes and attachments and navigating related ideas.

Coding foundations taught through visible program behavior

AI journal for mental wellbeing and clearer thinking.

Daily IELTS lessons, practice exercises, videos and model answers on a member learning site.

Graduate recruitment preparation with aptitude practice, video interviews and assessment-centre exercises.

Coding exercises for data and machine-learning study

SQL exercises running against SQLite in the browser

Small Rust exercises beside the language book

Grammar explanations and exercises with answer feedback.

IELTS practice and lessons with writing samples, vocabulary exercises and a speaking simulator.

Practical frontend exercises with hints and extensions

English explanations and exercises indexed by topic and level.

Language practice with exercises and mentoring

Free music theory exercises for learners and teachers

SQL questions and explanations using one consistent dataset

Timothy Snyder's reflections on history and the present

A directory of French-learning resources and original exercises.

Study words and concordances in a text corpus