Stop guessing your band.Let's raise it together.
Take a full mock and see where you stand. Then a real teacher helps you fix your writing and speaking, one step at a time.
Free during early access. No card needed.
Today with Boo
Review five wordsDone
Relative clausesDone
Fix past mistakesUp next
Listening, Part 210 min
Grammar review5 min
Reading passage 110 min
Practise on a screen that feels like test day.
Work through full Reading and Listening papers, or sit one of 44 full mocks. Then check each answer against the passage or transcript.
The quiet return of urban rivers
For much of the last century, many cities buried their small rivers under roads and car parks. Today, a growing number of planners are bringing them back into the open air. Opened rivers cool the streets around them and give fish and birds a way back into the centre.
In Seoul, a motorway was removed to uncover the Cheonggyecheon stream, and the new park now draws thousands of visitors a day.
7
Cities are now uncovering rivers that were once hidden.
8
Your essay comes back marked by a teacher.
Send an essay for review and you get a marked PDF and a note from your teacher. For speaking, book a live 30-minute call.

Teacher's note
Clear position and good paragraphing. Next step: support each main idea with one specific example.

Speaking session
Thursday, 18:00, 30 minutes with your teacher
Build the English underneath the score.
Spaced review shows each word again when it is due. Short video lessons cover grammar from articles to inversion.
sustainable
/səˈsteɪnəbl/
sustainable
able to continue for a long time without harming the environment
“The city wants a more sustainable transport system.”
Know what to study the moment you open Boo.
Boo sizes your plan to the minutes you have and fills it with the words and mistakes that are due.

12
day streak
This week
- M
- T
- W
- T
- F
- S
- S
Streak freezes
Season ranking
- 1Mina2140 XP
- 2Emre1730 XP
- 3You1690 XP
- 4Hoa1610 XP
Take a break without leaving English.
In each game, a right answer is your next move.
Pay only for teacher time.
Practice is free. Credits cover writing reviews and speaking sessions.
See pricingThe questions people ask first.
Read all questions
Start with Boo.
Join the list and your invite arrives by email when your place opens.





