Teacher guidance matters
A 2026 study with 89 English learners found higher behavioural, cognitive and social engagement when GenAI speaking practice included structured teacher guidance.
Min, Gao & Zhang – System (2026)
For independent language teachers · 1:1 lessons
Your teaching shouldn't stop when the lesson ends.
You decide what each student needs to practise. Charlie (the student’s personal AI practice assistant) turns it into personalised practice in Telegram, works with them between your 1:1 lessons, and tells you what needs attention next.
Try Charlie free:
- 1 student
- up to 10 exercises
- up to 14 days
- Whichever comes first
Teacher-led. AI-assisted.
- 1:1 students
- Your own lessons
- Practice between lessons
You write
Lesson with Anna – AI practice (Charlie)
Goal 1
Use past simple confidently when talking about completed events
Instructions for goal 1 (used verbatim)
Practise weekends and travel: went, saw, took, came, had. Don't introduce past perfect.
Practice using
- Conversation
- Role-play
- Speaking / voice messages
Charlie with your student
Charlie
bot
- Charlie
Quick one: what did you do after work yesterday? One sentence.
- Anna
I go to gym and then I meet my friend.
- Charlie
There's a slip in the verbs – you're talking about yesterday. Want to fix it yourself?
- AnnaVoice message, 0:31
Charlie to you, before the lesson
📋 Before your lesson with Anna (Thu 17:00)
Practice since the last lesson: 4 sent, 4 answered, 0 still open.
- Went well: went and saw are reliable in short answers
- Struggled with: took still needs a prompt
- Recurring: present tense in longer stories
- Suggested focus (your call): longer spontaneous stories about a past trip
Example: your goal for Anna, her practice in Telegram, your summary before the next lesson.
The gap
One lesson can teach a lot. Then a whole week passes.
When you teach students one-to-one, you usually know exactly what each person should work on next: a grammar structure, a few useful phrases, pronunciation, or simply speaking more.
But personalised follow-up takes time to create, send, correct and monitor. Lessonling keeps that learning direction alive between lessons.
Delegate the practice – not the teaching.
One lesson a week
Lessondays passNext lesson
With practice in between
Lessonpracticespeakingweak spotsNext
How it works
From one lesson to the next, in four steps.
You teach and decide. Charlie runs the practice in between. You see what happened before you meet again.
Teach normally
Have the lesson as usual. Nothing changes about how you teach.
Tell Charlie what to practise
“Anna understands past simple, but switches back to present tense in longer answers. Practise weekends and travel – went, saw, took, came, had.”
Type it into the lesson record, or say it to your own Telegram assistant after the lesson.
Your student practises in Telegram
Conversation, voice messages, role-play, recalling words, grammar in context, short writing, picture description – a short exercise at a time, more on request.
You see what happened
“Went and saw are reliable in short answers; took still needs a prompt. Recurring: missing articles before professions.”
A short summary in Telegram before the lesson, and every answer in the dashboard.
Who it is for
For teachers
Your students actually practise what you taught.
Less exercise preparation, practice that follows your lessons, and a clear picture before the next one. You keep the pedagogical control.
What you get
For students
Know what to practise, in a few minutes a day.
Short practice in Telegram, more chances to speak, feedback that helps, and continuity with your teacher.
What practice feels like
For teachers
You set the learning direction. Charlie handles the repetition.
Built for teachers who work closely with individual students and want that personal direction to continue between lessons.
Describe the goal in normal language. Charlie creates and adapts the actual practice – it follows your current teaching goal, not a random AI conversation.
You decide
- What the student should improve – up to two goals per lesson, in your own words
- The grammar, words and phrases to focus on, and the student's problem areas
- Which kinds of practice to use
- Whether the student tries to fix slips first, and anything you write in the instructions
- Topics to avoid
- How many correct answers in a row before goal 2
Charlie handles
- Choosing the next exercise
- Varying the contexts and the format
- Adapting the difficulty to the answers
- Coming back to problem areas
- Letting the student fix a slip themselves
- Collecting what you need to know before the next lesson
Lesson with Anna – AI practice (Charlie)You write · example
Goal 1 · active goal
Use the past simple confidently when talking about completed events.
Instructions for goal 1 (used verbatim)
She switches back to present tense in longer stories. Practise weekends and travel: went, saw, took, came, had. Don't introduce past perfect.
Problem areas (both goals)
Present tense in longer past stories; articles before professions.
Set once per student
Practice using
- Conversation
- Role-play
- Speaking / voice messages
- Grammar
- Writing (off)
Let the student try to fix short exercises first
Or say it to your Telegram assistant after the lesson: it drafts the goal, instructions and problem areas and asks “Record it?” before saving.
📋 Before your lesson with AnnaCharlie to you · example
Practice since the last lesson: 7 sent, 6 answered, 1 still open.
- Went wellWent and saw are reliable in short answers.
- Struggled withTook still needs a prompt; slips into present tense in longer stories.
- RecurringMissing articles before professions.
- Suggested focus (your call)Longer spontaneous stories about a past trip.
Sent to you in Telegram before each lesson. The suggestion is advice; the next plan is yours.
For students
Practise what your teacher actually wants you to learn.
Not another random chatbot conversation. Your practice follows your real lessons: the words you just learned, the grammar you need to use, the speaking you are building up to.
- Short practice. A few useful minutes when you have time, instead of waiting for the next lesson.
- Speaking. Send voice messages, answer questions, role-play real situations.
- Useful corrections. Hints when you are stuck, a chance to fix a slip yourself, and the mistake that matters explained.
- About you. Exercises use your work, hobbies and plans – next week’s meeting, your trip to Barcelona – so they are easy to picture and feel worth saying.
- Continuity. What you keep getting wrong comes back in later exercises – no chat starting from zero.
- Telegram. Normal text and voice messages, on your phone or computer.
Students join through their teacher, not by signing up.
- See itin the lesson, with your teacher
- Remember itrecall and short exercises
- Use itin your own sentences
- Use it spontaneouslyin conversation and role-play
In Telegram
Practice where conversations already feel natural.
Answer in a message. Send a voice message. Role-play a hotel check-in. Fix a sentence. Pick up a word you slipped on earlier in the week.
Buttons under each exercise ask for a hint, an explanation, something easier or harder, or another one. Charlie can read its replies aloud.
- Text
- Voice
- Hint
- Explain
- Too easy / Too hard
- Read aloud
Students use Telegram on their phone or computer. Those who don't have it yet install it once.
Charlie with your student
Charlie
Teacher's goal: past simple + irregular verbs
- Charlie
Quick one: what did you do after work yesterday? One sentence.
- Student
I go to gym and then I meet my friend.
- Charlie
Nice. There's a slip in the verbs – you're talking about yesterday. Want to fix it yourself?
- Student
I went to the gym and then I met my friend.
- Charlie
Exactly 👍
🎙️ Now tell me what happened after that. Try speaking for about 30 seconds.
- StudentVoice message, 0:31
- Two days later
- Charlie
Something you slipped on earlier this week:
What's the past form of take – and can you use it in a sentence about your last trip?
An example exchange: the teacher's goal, a self-correction, a spoken answer, and a known weak spot coming back.
Free
Everything around the lesson, free.
The administration side of Lessonling costs nothing, with or without Charlie.
Students
One place for each student: contact details, languages, level, notes and the full history.
Lessons
Record a lesson in one short dialogue: date, length, what you covered and what was difficult.
Prepaid packages
Sell a package of lessons; each recorded lesson is deducted automatically and you see what is left.
Invoices
Monthly invoices for pay-as-you-go students, a reminder when it is time, and sent and paid dates.
Calendar
A month view of every student's lessons, with Google Calendar as the source of the next lesson if you use it.
Student page
Each student gets a personal page: the next lesson, their balance, unpaid invoices, and a way to ask you to cancel or move a lesson, if you allow it.
With Charlie Keep a shared Google Doc per student? The lesson record can be drafted from that lesson's section, for you to check and save.
Adaptive practice
Give Charlie a goal, not a worksheet.
Charlie does not send a fixed set of exercises. It decides what kind of practice is useful next from how the student answers.
Practice on a goal starts easy and gets harder as the answers come right. After the number of correct answers in a row you set, it moves on to your second goal. A student who wants more can ask for an extra exercise at any time, up to a daily limit you choose.
- Student struggles A hint, an explanation, or an easier exercise on the same point
- Student gets it right A new context, less support, a harder step
- Student is confident Conversation and role-play – or on to goal 2
- Later in the week Comes back to the problem areas and known weak spots
Learning design
Built around how learning works.
Spaced practice matters
A meta-analysis of 48 second-language-learning experiments found medium-to-large benefits from spaced practice.
Kim & Webb – Language Learning (2022)
Retrieval matters
Learning is strengthened when students actively recall and use information rather than only seeing it again.
Carpenter, Pan & Butler – Nature Reviews Psychology (2022)
AI conversation can support language learning
Meta-analyses have found positive overall effects from chatbot- and GenAI-supported second-language learning.
Wang et al.; Li, Wang & Yang (2025)
These studies inform the design principles behind Lessonling; they did not evaluate Lessonling itself.
From a teacher
What teachers say.
“I love how Lessonling brings everything together in one easy-to-use, visually appealing system. From student information, invoices and shared documents to teaching links and lesson tracking linked to my calendar, everything is neatly organised in one place. It saves me tons of time and makes managing my teaching business considerably easier.
My absolute favourite feature, though, is Charlie, the AI learning assistant on Telegram. My students can practise between lessons, working on anything from grammar and speaking to professional communication and politeness. They receive immediate feedback, can respond to prompts by text or voice message, and choose how often they want to practise.
My students love it, and I enjoy that their learning continues beyond our lessons without adding more work to my schedule. If you’re an English teacher looking to simplify your admin while giving your students more opportunities to practise independently, I highly recommend giving Lessonling a try!”
Suzie Delgado – English teacher, English with SuzieWhy not just a chatbot
More than an AI homework generator.
| Feature | Generic AI chatbot | Static homework | Lessonling |
|---|---|---|---|
| Knows the teacher's current goal | Usually no | Sometimes | Yes |
| Adapts during practice | Yes, but generic | No | Yes |
| Works from the teacher's instructions | Limited | Yes | Yes |
| Conversation and voice | Yes | Limited | Yes |
| Comes back to known weak spots | Not systematically | Only if the teacher rewrites it | Yes |
| Exercises about the student’s own life – work, hobbies, plans – so they are easy to picture | Only if told each time | Same sheet for everyone | Yes |
| Reports useful observations to the teacher | Usually no | Basic scores | Yes |
| Teacher stays in control | Limited | Yes | Yes |
| Student administration | No | No | Yes, free |
Control
The teacher stays in the loop.
- You define the goals – at most two per lesson – and Charlie uses your instructions word for word.
- Plans your Telegram assistant drafts from your spoken report or shared document are saved only after you say yes.
- What Charlie notices about a student is kept apart from what you wrote, with its evidence, and you can dismiss anything wrong.
- The suggested focus is marked as advice: the pedagogical call is yours.
- Every exercise and every answer is there to read in the lesson's practice info.
Launch pricing
Free to run your teaching. Pay only for Charlie.
The administration stays free either way.
Free
Everything around the lesson
0 EUR / month
Free for as long as you use it
Free forever- Students, lessons and prepaid packages
- Automatic deduction from packages
- Invoices, calendar and Google Calendar
- A personal page for every student
Free AI trial
Start free
Includes the Charlie trial: 1 student, up to 10 exercises or 14 days – whichever comes first.
- 1 student
- up to 10 exercises
- up to 14 days
Trial ends when either limit is reached first.
Charlie 5
AI practice for up to 5 students at a time
19 EUR / month, excl. VAT
or 190 EUR a year – ten months' price
- Everything in Free
- Charlie practises with up to 5 students at a time
- Your own Telegram assistant: record lessons by voice, check balances, a summary before each lesson
- Lesson notes from your shared document
Charlie 15
AI practice for up to 15 students at a time
49 EUR / month, excl. VAT
or 490 EUR a year – ten months' price
- Everything in Free
- Charlie practises with up to 15 students at a time
- Your own Telegram assistant, as in Charlie 5
- Lesson notes from your shared document
Plans are bought inside the dashboard after you sign up. Prices exclude VAT; VAT is added at checkout.
What is a seat?
One student with AI practice switched on. Switch it off and the seat is free for another student straight away – no monthly counting.
The free AI trial
Starts automatically when you register. You can try Charlie with 1 student for up to 10 exercises or 14 days, whichever comes first. No request is needed.
When either limit is reached, Charlie switches off until you choose a paid plan. Your students, lessons, packages, invoices and other free administration features remain available.
Launch pricing
Monthly, or yearly for the price of ten months. Need more seats? Write to info@lessonling.com.
FAQ
Questions, answered.
For teachers
Does Charlie decide what my student should learn?
No. You set the goals for each lesson in your own words, the student's problem areas and the kinds of practice allowed. Charlie decides how to practise them adaptively, never what to learn.
Do I have to create the exercises?
No. You describe what the student should improve; Charlie writes the individual exercises and conversations around it. Every exercise is written by AI for that one student – from your goals, their level and what they told Charlie about themselves – not picked from a ready-made bank.
Which languages can Charlie teach?
European languages – English, German, French, Spanish, Italian, Czech, Polish and others, including Russian, Ukrainian and Greek. Asian languages such as Japanese or Chinese are not supported yet. Charlie writes everything in the student’s language and can explain in a second language if the student needs it.
So far Charlie has been tested most with English; tests in other languages are coming soon.
Can I control corrections?
Partly, and in plain words. One setting decides whether the student first tries to fix a slip in short exercises themselves – one try, always skippable. Anything else you write in the instructions – topics, words, what not to introduce – shapes the exercises and conversations; Charlie receives it word for word. Correction itself follows fixed rules. By default Charlie explains the mistake that matters for the current goal and fixes the rest quietly in the corrected sentence.
Can students practise speaking?
Yes. Students can answer with Telegram voice messages; Charlie transcribes them and replies to what was said. Students can also ask Charlie to read its replies aloud.
What do I see before the next lesson?
A short Telegram summary: how many exercises were sent and answered, what went well, what the student struggled with, what keeps recurring, and a suggested focus. In the dashboard you can read every exercise and answer of that lesson's practice.
Does this replace the teacher?
No. Lessonling is practice directed by the teacher, between the teacher's lessons. You decide what is practised; Charlie makes sure there are enough chances to practise it.
What happens after the trial?
The free AI trial ends after 10 exercises or 14 days, whichever comes first. Charlie then switches off for you and the trial student until you choose a paid plan. Your students, lessons, packages, invoices and the rest of Lessonling's free administration stay available.
For students
Is this another language course?
No. It is practice connected to the lessons you already have with your teacher.
How do I start?
Ask your teacher. Students don't sign up themselves: your teacher switches AI practice on for you and sends you a personal link that connects your Telegram to Charlie.
Do I need another app?
Practice runs in Telegram, on your phone or computer. If you don't use Telegram yet, you will need to install it.
Can I speak instead of typing?
Yes. Send a voice message and Charlie replies to what you said. You can also ask Charlie to say its replies aloud.
Will it correct every mistake?
Not out loud. Charlie explains the mistake that matters for your current goal and fixes the others quietly in the corrected sentence. In a conversation a slip doesn't stop the scene. If you want more, ask for the next mistake to be explained.
Can I practise whenever I want?
Yes. An exercise arrives at the time you choose on your student page, and you answer when it suits you. Whenever you have a few more minutes, ask Charlie for another one, up to the daily limit your teacher sets.
Turn the next lesson into a week of practice.
After your next lesson, tell Charlie what to practise, let it handle the repetition, and see the result before you meet again.
Try Charlie with 1 student for up to 10 exercises or 14 days, whichever comes first.
- 1 student
- up to 10 exercises
- up to 14 days