English

Test the grammar fundamentals every English speaker should know.

Test your knowledge of popular English idioms used in everyday conversation.

Challenge yourself with the high-level vocabulary tested on the SAT exam.

How well do you know the differences in spelling, vocabulary, and usage between British and American English?

Effect or affect? Fewer or less? Master the word pairs that trip everyone up.

Commas, semicolons, apostrophes, and the rules that trip everyone up.

When the subject acts vs. when it's acted upon — and when each is better.

Zero, first, second, and third conditionals — and where they trip you up.

Can, must, might, should — expressing ability, obligation, and possibility.

A, an, the, or nothing at all — the rules that trip up even fluent speakers.

In, on, at — the tiny words that decide whether a sentence sounds right.

Go/went/gone and the verbs that refuse to follow the rules.

All the major English tenses in one comprehensive review.

The tense pair that confuses English learners more than any other.

Which past action happened first? That's what Past Perfect is for.

Will, going to, present continuous — four ways to talk about the future.

Who, which, that, whose — connecting ideas the right way.

Converting direct quotes into reported speech — tense shifts and all.

Furniture, advice, information — nouns that break the plural rules.

Prefixes and suffixes — how English builds new words from old ones.

Parts of speech, subject-verb agreement, punctuation, and sentence types for ages 10-11.

Words that mean the same — and words that mean the opposite.

Words that sound the same but mean completely different things.

Give up, look after, break down — verbs that change meaning with a preposition.

Make a decision, take a risk — the word pairings that just 'sound right'.

The early bird, spilled milk, and the wisdom hidden in old sayings.

As busy as a bee vs. time is a thief — spotting the difference.

Words that look familiar in another language but mean something else entirely.

Thesis statements, counterarguments, and the language of formal essays.

Synergy, ROI, stakeholders — the vocabulary of the modern workplace.

API, bandwidth, encryption — the language of the digital world.

From baseball pitchers to rugby scrums — sports terms across the board.

Hypertension, dyspnea, and the terminology behind a doctor's visit.

Plaintiff, tort, jurisdiction — the vocabulary of courts and contracts.

Braising, julienning, simmering — the language of the kitchen.

Passports, check-in, currency exchange — the English you need on the road.

The advanced vocabulary that separates a Band 6 from a Band 8 on IELTS.

The academic vocabulary that shows up constantly across TOEFL reading and listening.

Obfuscate, sanguine, perspicacious — the notoriously hard words the GRE loves to test.

Corroborate, axiomatic, obfuscation — the vocabulary of serious academic writing.

From the greeting to the follow-up email — the English that gets you hired.

Gonna vs going to, Dear Sir vs Hi — knowing which register to use, and when.

Think outside the box, at the end of the day — the phrases that drain your writing of impact.

'I before E except after C' — and all the words that break the rule anyway.

Metaphor, irony, alliteration — the tools writers use to make language do more.

Thou, doth, wherefore art thou — decoding the English of Shakespeare's plays and sonnets.

Rendezvous, ad hoc, curriculum — how much of 'English' actually came from somewhere else.

Salutation, CC, BCC — the vocabulary and etiquette of a professional email.

Forty-two, 3,500, 2nd — the rules for writing numbers correctly in English.

PREsent vs preSENT — the syllable emphasis that can completely change a word's meaning.

Simple Past, Past Continuous, Past Perfect — the tenses that make a story make sense.