Master Grammar with Confidence
A comprehensive, beautifully designed grammar reference in three editions — so there's one for your needs: the original English edition for schools, colleges, and universities; a multilingual edition in 34 languages for learners around the world; and a new Key Stage 2 & 3 edition for ages 7-13. Every edition includes a built-in quiz.
Available on every platform
Why Choose The Grammar Index™?
Built by educators, designed for learners of all levels.
Structured Learning App — in 34 Languages
learning.grammarindex.com →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 303-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.
Key Stage 2 & 3 Edition
keystage.grammarindex.com →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. Available at keystage.grammarindex.com.
Comprehensive Reference
Over 300 grammar topics covering parts of speech, sentence structure, punctuation, syntax rules, phonics, and more — each with a clear definition and up to ten worked examples (occasionally amusing ones) showing the rule in real sentences.
Cross-Platform Access
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 them all.
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.
Who Is The Grammar Index For?
Primary & Secondary (Ages 7-13)
The new Key Stage 2 & 3 edition is built for younger pupils and works straight from Google Classroom, Microsoft Teams for Education, and Apple Store for Education. Schools sponsor whole classes or year groups through our Gift / Sponsorship tier.
Schools & Colleges
Provide students with a reliable grammar reference they can use across all their subjects and assignments.
Universities
Support academic writing standards with a tool that covers everything from basic grammar to advanced syntax.
ESL/EFL Learners
Perfect for learners in countries where English is not the first language. Clear definitions, practical examples, and offline access. The multilingual learning app presents everything in your own language — 34 in all, including Spanish, French, German, Greek, Arabic, Persian, Urdu, Hindi, Bengali, Chinese, Cantonese, Japanese, Korean, Vietnamese, and Thai.
GCSE, IELTS & TOEFL Revision
Turn grammar into marks with learning.grammarindex.com — a structured path, daily drills, and quizzes that focus your revision a few minutes at a time.
Self-Learners
Whether you're preparing for exams or improving your writing, The Grammar Index is your pocket grammar companion.
Now open: the Grammar Index™ Shop
Mugs, tees and totes for people who know where the comma goes.
Designed by the makers of The Grammar Index™. Browse at shop.grammarindex.com.
Start Learning Today
Try 10 grammar entries for free — no registration required.