11 courses. Each one finds a mistake you have been making for years, fixes it, and drills it until it sticks. 25 minutes a lesson.

Three mistakes in one sentence. Each one is a different course.
No sign-up · no credit card · works on a phone
11
courses
70
chapters
421
lessons
all
open today
One course for each. Start with the first one you still get wrong — early mistakes cost you marks in every sentence you write.

Word Forms
A word you know, marked wrong because of its ending
The impact was economical.The impact was economic.
7 chapters · 42 lessons
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Collocation
Correct English that no native speaker would ever write
The study makes a conclusion.The study draws a conclusion.
7 chapters · 43 lessons
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Precision
Using a rare word when the ordinary one scores higher
The plan will eradicate traffic.The plan will reduce traffic.
7 chapters · 42 lessons
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Sentence Accuracy
Articles, agreement and tense — small errors, every sentence
The students works together.The students work together.
5 chapters · 35 lessons
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Complex Sentences
Everything joined with “and”, because nothing else feels safe
I was tired and I left.I left because I was tired.
5 chapters · 35 lessons
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Structure and Emphasis
Right words, wrong order — the point buried in the middle
Cost is the real problem.The real problem is cost.
5 chapters · 35 lessons
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On your report: Task Response · Coherence and Cohesion

Developing an Idea
Ideas you mention once and never explain
Traffic is bad.Traffic is bad, so people arrive late.
5 chapters · 35 lessons
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Paragraph and Progression
Paragraphs that lose the reader halfway through
The reader goes back to check.The reader goes straight on.
5 chapters · 35 lessons
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Reading, Task 1 and Task 2 — method and timing

Reading Strategy
Reading every word, then running out of time
Read every word, then run out of time.Find the answer. Skip the rest.
7 chapters · 33 lessons
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Writing Task 1
Listing every number instead of describing the trend
In 1990 it was 23%, in 1991…It rose steadily, then levelled off.
8 chapters · 41 lessons
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Writing Task 2
A memorised template that answers a different question
The opening you memorised.The question actually asked.
9 chapters · 45 lessons
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Not sure which of the eleven is yours? Start here. Tap the sentence you would have written.
Both are correct English. One of them scores higher.
See it. A real sentence with the mistake still in it.
Choose. Two versions. Both look correct. Only one gets the mark.
Practise. Fill in the gaps and put sentences back together. The rule stays on screen until you stop needing it.
Write it. You write a sentence. We mark it for this one mistake only.

We only mark the mistake this lesson is about
We do not predict your band, and we are not a practice-test library. We fix the English. You book the test. No credit card.