In class
You teach.
It listens.
The teacher works through a quadratic equation on the board, explaining each step aloud. ContextFriend listens from the side of her desk.
The device stays in the background.
Automatic lesson summaries. Private by design.
The lesson ends.
The learning stays.
Private by design.100 % local · encrypted · GDPR / DSGVO
ContextFriend gives your class a memory. The explanations, examples and homework of each lesson are summarised automatically, so teachers and students can revisit them, ask questions and practise.
Quietly in the classroom. No screen, no lights, no sound.
From the classroom to the kitchen table
One lesson.
A memory to return to.
The bell rings. The classroom empties. The explanations and examples can still help later.
You teach.
After class
The key ideas,
ready to revisit.
Later, the teacher returns to the worked example, the explanation of factorising and the homework discussed in class.
Read it on a phone, tablet or laptop.
After school
Pick up where
the lesson left off.
At home, a student asks why either factor can be zero. The class explanation gives them a place to start again.
Home access when enabled by the school.
Illustrative school day. Summaries become available after processing, according to the school’s setup.
For teachers
Remember the lesson.
Build on it tomorrow.
Your class memory brings back the examples, explanations and assignments you want to build on.
- A summary to come back to.Revisit the topics and examples covered, with homework when it was mentioned.
- Ask about your own teaching material.“Which example did we use last week?” Find your way back into a topic.
- Add materials when they help.Bring in a worksheet or document alongside what was discussed in class.
Summaries focus on learning content, without scoring or ranking teachers. AI output can be incomplete or mistaken.
ContextFriendSummaries
Tuesday · Mathematics
Quadratic equations
What we covered
Solving a quadratic equation by factorising, then checking both solutions.
The key idea from classA product is zero when at least one factor is zero.
We rewrote x² − 5x + 6 = 0 as (x − 2)(x − 3) = 0. This gives x = 2 or x = 3. Substituting either value into the original equation gives zero.
Homework mentioned
Solve x² − 7x + 12 = 0 by factorising. Check both solutions in the original equation.
Based on the available lesson material
Illustrative summary · fictional lesson
ContextFriendMy class
Ask about the lesson
Why can either factor be zero?
In class we wrote (x − 2)(x − 3) = 0. Multiplying by zero gives zero, so the product is zero if x − 2 = 0 or x − 3 = 0. That gives the two solutions x = 2 and x = 3.
From Tuesday’s mathematics lesson
x = 4 or x = −1.
CorrectYes. Each value makes one of the factors zero, so the product is zero.
Illustrative example · fictional lesson, no live AI
For students
Ask again.
Until it clicks.
Missed a lesson? Stuck on an example? Your class memory gives you a place to return to, ask in your own words and practise at your own pace.
Try an example:
Lesson answers use the available class material. Extra explanations from general knowledge are marked separately. If information is missing, the answer should say so.
For parents
A little more
“I understand.”
When your child gets stuck at home, the classroom explanation is a place to start again.
“Why do we get two possible answers?” With home access enabled by the school, your child can return to the class explanation and put it into their own words. You can support them, even if you weren’t there for the lesson.
What families and schools should know
For your school
Clear boundaries.
Before the first lesson.
ContextFriend runs 100 % locally in your school. No cloud. Everything is encrypted, every class is kept separate, access is controlled and GDPR / DSGVO responsibilities are clear.
Learning comes first.
Summaries cover the subject matter of the lesson. They never comment on how anyone taught or behaved.
Access is controlled.
Students and teachers use separate class codes. Every class is kept strictly apart, and home access is switched on by the school.
The setup is explained.
Before the first lesson, your school and we agree how speech is processed, what is stored, who has access and when it is deleted. Families are informed beforehand.
How is classroom data protected?
Everything runs on a server in your school: speech recognition, filtering, summaries, search and AI. No cloud, no external AI services. All data is encrypted, in storage and in transit. Voices are never stored as audio files, names and private remarks are filtered out before anything is saved, and speakers stay anonymous. Students and teachers see summaries and answers, never a transcript. Teachers can review, correct or delete notes. The school sets the retention period; by default, learning content is deleted at the end of the school year.
Read the school privacy information · Discuss your school’s requirements
Start with one classroom
Give your class
a memory to build on.
Tell us how you teach and what your students need. We’ll talk through a pilot, the setup and the questions that matter to you.
Explore a school pilot
A conversation, not a purchase order.
What do you mean by “class memory”?
It is a way to return to what your class covered after the lesson ends. A small device listens in class; AI turns the available material into summaries and helps teachers and students ask about it later. The classroom device has no screen, lights or sound. You revisit the class memory through a web app.
Does the teacher need to change how they teach?
Teach as usual once the school has set up the device and agreed when it can listen. Materials can be added when useful. The device has no camera, so something written only on the board needs to be explained aloud or added as material.
When can we read the summary?
Summaries are prepared after lesson processing. Day summaries follow the school’s configured schedule. They are not guaranteed to be ready the moment the bell rings.
Can students use it at home?
When the school enables home access, students use its class link and access code on a phone, tablet or laptop. They can revisit summaries, ask about the lesson and practise. There is no extra ContextFriend device to take home.
Where is classroom data processed, and how long is it kept?
On a server in your school. Speech recognition, filtering, summaries and AI run locally, with no cloud and no external AI services, and everything is encrypted. Voices are never stored as audio files. The school sets the retention period for learning content; by default it is deleted at the end of the school year.
Does it replace the teacher or always give the right answer?
No. It supports the teacher and uses available lesson material. AI can make mistakes or miss information. General explanations are marked separately from class material, and students should check important points with their teacher.