Vocabulary Builders
Grow a mighty word bank — synonyms, antonyms, prefixes, and roots that unlock new words.
Ms. Grace Miller
Reading Specialist
Common questions
Who is "Vocabulary Builders" for?
It is written for learners at Elementary level (Grades K–5), and for anyone older who wants a clear refresher on english. Grow a mighty word bank — synonyms, antonyms, prefixes, and roots that unlock new words. There is no application or entry test — you can start the first lesson straight away.
How long does the course take?
There are 3 lessons totalling 18 minutes of reading and quizzes, laid out over 2 units. You can move at your own pace — progress is saved as you go.
What do I need to know before starting?
No prior coursework is assumed. The course opens with "Word Meanings", covering synonyms and antonyms, so the foundations are built in rather than expected.
Is the course free?
Yes. Every course on Monster Class is completely free, with no credit card, trial period or paywall. Creating a free account simply saves your progress, XP and place on the leaderboard across devices.