English Grammar Reference and Learning Platform

Structured Learning App — in 34 Languages

More than a reference: learning.grammarindex.com turns grammar into a course — an eight-level learning path, daily spaced-repetition drills, and quick quizzes, all built on the full 314-topic reference. The interface and every definition are available in 34 languages — English, Spanish, French, German, Italian, Portuguese, Dutch, Polish, Czech, Danish, Greek, Hungarian, Indonesian, Romanian, Norwegian, Swedish, Finnish, Russian, Ukrainian, Turkish, Arabic, Persian, Urdu, Hindi, Bengali, Gujarati, Punjabi, Somali, Chinese, Cantonese, Japanese, Korean, Vietnamese, and Thai — ideal for international students and anyone revising for GCSE, IELTS, or TOEFL. And because pronunciation matters as much as rules, a professionally voiced read-aloud narrator speaks every title, definition and worked example in English, at your choice of three speeds — so you can read the explanation in your own language and still hear the English said properly. More about the International edition →

Key Stage 2 & 3 Edition

A child-friendly version for ages 7-13, aligned with the UK National Curriculum English programme of study and designed for use across Google Classroom, Microsoft Teams for Education, and Apple Store for Education. Right examples, wrong examples explained, and a little joke on every card — plus a quick quiz and a new Spelling Test that drills 1,000 curriculum spelling words. Built so every child can reach it: a warm read-aloud voice on every card, dyslexia-friendly display options (easy-read font and calming colour tints), and focus tools for ADHD — a distraction-free focus mode, gentle streaks and rewards, and an optional focus timer.

Pupils work through five parts of the curriculum — reading and comprehension, fiction, poetry, non-fiction, and grammar, punctuation and spelling — each ending in a marked ten-question exercise. Whatever a pupil gets wrong becomes a jobs list of topics to read again, and the exercise comes back for a retest: a few weeks later if they did well, a couple of days if they struggled. An exercise record tracks first, latest and best score for each part, and lists topics weakest-first.

Available on the web at keystage.grammarindex.com, as a Windows app on the Microsoft Store, and as apps for iPhone, iPad and Android — the exercises, learning path and jobs list included. More about the Key Stage 2 & 3 edition →

Grade 3 to 8 Edition — for the United States

New in September 2026: the Key Stage 2 & 3 design rewritten for American classrooms. 124 topics for Grades 3 to 8 in US spelling, vocabulary and punctuation — periods and exclamation points, the serial comma, run-on sentences, sight words, General American pronunciation — each with right examples, a wrong example explained, and a little joke. Five graded exercises follow the English Language Arts curriculum and turn wrong answers into a Todo list, a Spelling Test draws on 996 grade-level words in American spelling, and the same read-aloud narrator, easy-read font, colour tints and focus tools are built in. The Windows, iPhone, iPad and Android apps reach the Microsoft Store, App Store and Google Play as each completes its review.More about the Grade 3 to 8 edition →

Comprehensive Reference

Over 300 grammar topics covering parts of speech, sentence structure, punctuation, syntax rules, phonics, imagery and poetry, and more — each with a clear definition and up to ten worked examples (occasionally amusing ones) showing the rule in real sentences. More about the English edition →

Cross-Platform Access

All four editions are available on the web, Windows, iOS, and Android. Learn on the classroom PC, on your tablet during the commute, or on your phone wherever you happen to be — one licence covers every platform and every edition. See what each edition includes →

Search & Filter

Instantly find any grammar topic with real-time search. Filter by category to focus on exactly what you need.

Built for Education

Institutional pricing makes it affordable for schools and universities. One license key, multiple devices — perfect for distributing to students.

Test Yourself

Every edition includes a built-in five-question quiz. Open the topics you want to revise, then take a tailored multiple-choice quiz drawn from those entries — different questions every time, so retake reinforces rather than repeats.