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Elixir practice by making small failing exercises pass

Fraction and percentage practice with exercises, a learning mode and answer feedback.

Short story episodes with personalized language exercises.

A directory of French-learning resources and original exercises.

Short interactive language lessons with ongoing review.

Learn Ruby by correcting ordered test-based exercises

Interactive Icelandic built around life in Iceland.

Study words and concordances in a text corpus

German grammar practice with explanations and progress tracking.

Piano learning with songs and graded exercises

French-learning podcasts and exercises using international news.

Employment assessment preparation covering aptitude tests, interviews and assessment-centre exercises.

Times table practice with individual table exercises, speed activities and printable worksheets.

A browser IDE for running short code samples or building supported multi-file projects across many languages.

Build browser interfaces with declarative components compiled from HTML, CSS, and JavaScript.

A browser editor for micro:bit projects with Blocks, JavaScript, Python, and a device simulator.

Build web pages and command-line programs with a general-purpose scripting language and interpreter.

Inspect a website in remote browser sessions to reproduce cross-browser and responsive-layout issues.

Programming tutorials with topic-specific exercise collections

UX research articles and training in live and self-paced formats

Design courses, a free UX library and community learning resources

Election and meeting ballots with separate simulation and full test modes

Fresh sight-reading exercises generated to a chosen level

iPhone and iPad drawing with community challenges and co-ops