IGCSE subject vocabulary is hard because of three kinds of words: familiar words with new meanings (product as a multiplication result), pure subject terms and command words. Learn them by subject in batches of five to eight, in three steps — meet and type the word, complete the missing letters, match flipped cards — and replay older rounds every other day. The free tool GachaLex turns those steps into levels sorted by subject and year.
When a child moves into an international school, the first wall is rarely spoken English. It is the subject vocabulary in the textbook and on the exam paper. A student with solid everyday English can still open a physics paper and not understand the question — not because their English is weak, but because subject English is a different set of words.
1. Why subject vocabulary is hard: three kinds of words
Circle every unfamiliar word on an IGCSE paper and they fall into three groups:
| Type | Examples | The trap |
|---|---|---|
| Familiar words, new meanings | product (result of multiplying), solution (a mixture), table (of data), power (rate of energy / exponent) | The student thinks they know the word, reads it with its everyday meaning, and misreads the whole question |
| Pure subject terms | photosynthesis, denominator, inflation, erosion | Almost never heard in conversation, so they have to be learned on purpose |
| Command words | state, describe, explain, evaluate, calculate | They set how much the answer must contain; misread one and marks are lost on a question the student could do |
The first group is the sneakiest. Nobody looks up a word they believe they know, so these mistakes only surface when you work through a subject word list systematically.
2. Why reading a word list top to bottom works badly
- Alphabetical lists have no context. Abacus is followed by absolute value; the two have nothing to do with each other, so no structure forms.
- They train recognition only. Seeing the English and recalling the meaning is the easy direction. Exams need the reverse: seeing the idea and writing the correctly spelled term.
- Too many at once. Thirty words in one sitting leaves fewer than half the next day, and more frustration than progress.
3. The three steps: meet it, complete it, match it
The routine I use with my own child is plain, and each step is only slightly harder than the one before:
- Meet the word and type it once. Look at the spelling, the phonetics and the meaning, listen to it, then type the whole word yourself. Eyes, ears and hands all pass over it.
- Complete the word with letters missing. Some letters are removed and the student fills them in. This moves from copying to half-recall, and it is aimed squarely at spelling.
- Match flipped cards. The English words and their meanings are shuffled as cards to turn over and pair. There is no hint at all, so this checks whether word and meaning are really connected.
After the three steps, the same word has been actively handled three times in a few minutes, in three different ways. That beats reading a list silently ten times.
4. A ten-minute daily plan
- Follow the school's pace. If maths is on fractions this week, learn the fraction words. They get used in class straight away, which is what makes them stick.
- Five to eight words per round. One small round a day is better than thirty words on Sunday.
- Replay old rounds every other day. Any round where accuracy drops below 80 percent is not settled yet; schedule it again.
- Ask for one subject sentence per word. If the child can say something true about fractions using denominator, the word is learned.
5. Automating the routine with GachaLex
If a parent has to write these exercises by hand, the routine lasts two weeks at most. So I turned it into a free web tool, GachaLex, which runs in the browser:
- Levels sorted by subject and year: maths, physics, chemistry, biology, economics, business, geography, ICT and more — 10 subjects and over 3,300 entries, from Year 1 to Year 11.
- Each level is the three steps above: learn the spelling, fill in the blanks, match the cards, in a fixed order that needs no planning from a parent.
- Try it without signing up: guest mode lets you play a round straight away; progress and points are saved once you register.
- Points and a pet: clearing levels earns points, which hatch and feed a study pet. For younger children that works better than asking whether they have revised today.
- Six interface languages: Simplified Chinese, English, Japanese, Korean, Thai and Traditional Chinese, with meanings shown in the language you choose.
GachaLex is a learning tool I build independently. Its word lists are organised around publicly known course topics; it is not affiliated with or endorsed by Cambridge or any exam board. For what is examined, follow the syllabus published by your school and the exam board.
6. Three common mistakes
- Fixing everyday English first. The two can run in parallel. Subject vocabulary decides whether the lesson is understood at all, so it cannot wait.
- Stopping at the translation. A translation is the way in. In the upper years, get used to reading the English definition, because the answers are written in English.
- Treating a finished game as mastery. A game solves repetition and motivation. The words still have to be used in textbook examples and past questions.
7. In short
Subject vocabulary is not mysterious. It is large, dry, and easy to believe you already know. Split it by subject, keep each batch small, climb the three steps, and let a tool carry the repetition — ten minutes a day is enough to keep up with school.
Frequently asked questions
How is IGCSE subject vocabulary different from everyday English?
It is full of familiar words with new meanings (product as a multiplication result), pure subject terms and command words. Good everyday English does not guarantee understanding an exam paper.
How many subject words should a student learn per day?
Five to eight in one short round a day, replaying older rounds every other day. Small and frequent beats a weekend cram.
Is GachaLex free, and do I need an account?
It is free. Guest mode lets you play a round without signing up; a free account is needed to save progress, collect points and raise a pet.
Is GachaLex an official IGCSE word list?
No. It is an independent learning tool, not affiliated with or endorsed by Cambridge or any exam board. Follow the official syllabus for what is examined.