Learn it by teaching Errby.
Errby is designed to help students practise explaining a lesson, correct misunderstandings, and see which ideas need another attempt.
You explain. Errby asks.
You work through the idea.
ErrbyWhy does an ice cube melt in a warm room?
LearnerEnergy transfers from the warmer surroundings to the colder ice. That energy can melt the ice.
ErrbySo the ice makes the heat it needs to melt?
LearnerNo. The energy comes from the warmer surroundings. The ice does not make its own heat.
A lesson you explain,
not just read.
- 01
Start with a message.
Say hello, name a topic, or paste your notes directly in chat.
- 02
Teach it in your own words.
Answer Errby’s questions and help it work through a misunderstanding.
- 03
Keep the conversation going.
Errby asks follow-ups while understanding is checked quietly in the background.
What teaching Errby looks like.
Here’s a prewritten example about heat transfer. Errby asks first, then gives the learner a misunderstanding to correct.
Learner corrects Errby
Illustrative example · prewritten conversation · unreviewedErrbyWhy does an ice cube melt in a warm room?
LearnerEnergy transfers from the warmer surroundings to the colder ice. That energy can melt the ice.
ErrbySo the ice makes the heat it needs to melt?
LearnerNo. The energy comes from the warmer surroundings. The ice does not make its own heat.
ErrbyThen why could wrapping the ice in an insulating material slow its melting?
The conversation continues with a new example.
Errby works through a correction A second prewritten example
Illustrative example · prewritten conversation · unreviewed
ErrbyWhy does an ice cube melt in a warm room?
LearnerEnergy transfers from the warmer surroundings to the colder ice. That energy can melt the ice.
ErrbySo the ice makes the heat it needs to melt?
LearnerYes, the ice makes heat to melt.
That idea needs correcting: energy transfers from the warmer surroundings to the colder ice. The ice is not producing its own heat to melt. Try explaining where the energy comes from in a new example.
ErrbyIf you put a cold spoon in warm water, which way does energy transfer?
Copying a correction earns no progress. A real lesson needs independently valid evidence in a new response.
You explain. Errby listens.
An AI Supervisor checks explanations in the background. Errby brings any corrections or uncertainty into the conversation. Progress depends on your own explanations, not how many messages you send.
AI feedback can be wrong. Uncertain claims stay unresolved.
Start from the lesson
you want to understand.
Start chatting about an idea. Paste a short passage from your notes when you want saved practice grounded in reference material.
A topic
A specific idea to explore.
Your notes
Reference material to ground the lesson.
Your explanation
An idea in your own words, ready for a follow-up question.
Curious about Errby?
Is Errby the teacher?
The student does the explaining. Errby is an AI learning character designed to ask questions and introduce focused misunderstandings to work through.
Why does Errby sometimes get something wrong?
The learning design uses selected misunderstandings to invite a clearer explanation. The first question is genuine, and deliberate mistakes stay within the idea being explored.
What if the learner agrees with a wrong idea?
An AI Supervisor checks in the background. Errby shares the correction or uncertainty in the same conversation. AI feedback can be wrong.
Who is it designed for?
Errby is designed for school-age learners, from primary through high school. The intended interaction is typed and in English; younger learners may need help reading or typing.
Can I use my own notes?
Yes. Paste reference notes directly in chat to start saved practice with evidence-based feedback.
Does ‘Explained’ mean mastery of the subject?
No. Progress is based on evidence from your explanations. It is not a subject-wide judgement or a school grade, and uncertainty never counts as completion.
Is Errby available to use?
This page demonstrates the intended experience with prewritten examples. Sign in to open the chat workspace; this illustrative page does not assess or save answers.
Start with the examplePick an idea.
Explain it to Errby.
See how a small misunderstanding can turn into a clearer explanation.
See an example