Murder mystery English lesson: a no-prep ESL detective game
JACK & MANI
Murder mystery English lesson: a no-prep ESL detective gameYour students interrogate AI suspects in writing, in English, on their own devices
One lesson, one crime, one culprit to name. Your students question the suspects in writing, in English, and every message comes back corrected. Two minutes to set up, nothing to print.
Create the session
Project the QR code: students join with a nickname, no account.
Let them interrogate
Each student questions the suspects in writing and gets every message corrected.
Debrief
The board shows who is stuck and the mistakes by axis. Finish with the accusation.
What is a murder mystery English lesson?
A murder mystery English lesson is a role play where students solve a crime by questioning suspects in English. The classic version is the alibi game: two students invent an alibi, the class interrogates them and looks for contradictions. In Jack & Mani the suspects are AI characters. Every student interrogates them in writing, at the same time, and each message comes back corrected. There is no script to follow: the story reacts to the questions, and the culprit is only found by cross-checking what the suspects say.
Why it works better than a worksheet for ESL students
Students write because they want the answer, not because the exercise says so. Question forms and past tenses get used for a real purpose: checking an alibi, placing a suspect at a time and a place. The correction arrives after every message, in the student's own bubble, so nobody is corrected in front of the class. And because everyone writes at once, the quiet students produce as much as the talkative ones.
Levels, timing and how to run the debrief
Count on A2 to follow the story and B1 to shine. The case fills one lesson: two minutes to create the session, forty to fifty minutes of investigation, ten minutes of debrief. For the debrief, open the class board: it sorts the mistakes by axis (spelling, grammar, conjugation, clarity) without keeping any student text, so you can pick the two or three points to work on next time. Groups who finish early go back to the suspects to confirm the culprit's motive.
The lesson plan, minute by minute
Count on one lesson from the first suspect to the final accusation. Fast students dig into red herrings, so nobody waits. Below, what each side gets out of it.
What students practise
Question forms, the natural way: they need the answers
Past tenses, to check alibis and timelines
Reading for detail, to spot the contradictions
Writing without fear: corrections stay in their bubble, never on the board
What you get
Nothing to print, nothing to install, ready in two minutes
Up to 40 students, each on their own device
A live board: who moves forward, who is stuck, who has solved it
Zero student data: nicknames only, deleted with the session
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What teachers notice after the first session
The points that come up most often.
The whole class writes at the same time, including the students who never raise a hand.
Question forms finally practised for a reason: they want the suspect's answer.
The debrief writes itself: the board has already sorted the three most frequent mistakes.
Read also
Run the murder mystery with your class
Create a session in two minutes, project the QR code and let your students interrogate the suspects in English. The Teacher plan starts with a 14-day free trial.
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