For parents
实事求是 shí shì qiú shì — “Seek truth from facts”
What your child has actually learned, one child at a time, in plain language — including the difference between “struggling” and “we do not know yet”, which most reports quietly collapse.
The Lab itself sits behind sign-in, because everything in it is about one specific child.
You see their learning record — what they have retained, what has faded, where they are thin. You do not see the words they typed into an exercise, their messages, or their cognitive-task results. Consent to see someone’s homework is not consent to read over their shoulder.
The five cognitive tasks are short optional research exercises, never inserted into lessons, and their results are shown to the learner alone. Not to a teacher, not to an institution, and not to you.
Why it exists
You can already see how many lessons your child finished. That is the least useful number in the room, and it is usually the only one on offer.
A completion bar moves the same amount for the lesson your child understood and the one they clicked through while tired. It cannot tell you which was which, so it cannot tell you what to do this week.
The Lab counts recall separately from attendance, and only recall feeds a figure.
Most reports show a small number when a child has barely started, which reads as “bad at this” rather than “we have not measured this yet”. Parents act on that, and they act on the wrong thing.
A figure without enough behind it is withheld and says so, in words, rather than shown small.
Reading a character, hearing it, saying it and writing it come apart badly — a child can be strong at three and stuck on the fourth, and one average hides exactly the one that needs help.
Each is measured on its own, so “what would help most this week” has a real answer.
What actually happens
Four steps. Nothing is inferred from other children, nothing is predicted, and the last step is allowed to say it does not know.
A flashcard, a lesson exercise, a spoken phrase. There is no separate test, and nothing extra for them to sit.
What was asked, whether it was right, how long it took and how long since they last met it. One row, appended, never edited.
How often each word has been tested, how often recalled, how stable it has become, and which mistakes keep coming back.
Written in plain language, with the number of observations behind it — and withheld outright when there are too few to mean anything.
What gets measured
A Chinese word is not one thing a child either knows or does not. It is seven abilities that grow at different rates, which is why a single mark for “知道” tells you nothing you can help with.
Seven ways of knowing a word — meaning, character, pinyin, tone, listening, speaking and writing — counted apart, because in practice they come apart.
A free account opens the first three — Meaning, Character and Pinyin — with real evidence behind them. The other four are measured on Pro, on each learner’s own plan rather than on their teacher’s or their parent’s.
Create a free account to see what it measuresHow to trust it
Every figure carries how many observations produced it, and one that has not earned the right to be shown says how many more are needed instead of printing a smaller number.
You see what your child has retained and produced — never what they typed, never their messages, and never a judgement about them as a person.
No webcam, no eye-tracking, no emotion or attention inference — not now and not later. What is recorded is what was answered and how long it took.
The full version — what is recorded, what is never recorded, and how to stop it — is on the ethics and consent page, which is open without an account.
Questions
No, and that is deliberate. You see their learning record — what they have retained, what has faded, where they are thin. You do not see the words they typed into an exercise, their messages, or their cognitive-task results. Consent to see someone’s homework is not consent to read over their shoulder.
Never. Each child has their own page and their own figures, and there is no combined view — an average across two children describes neither of them.
Exactly that: not enough practice of that specific kind has happened for a figure to mean anything. It is not a low score, and it is not a warning. The page names which practice would fill it.
It will not, because it does not compare your child to other children. It compares them to their own earlier weeks, which is the comparison that survives differences in when they started and how much time they have.
Yes, and only you can. A managed account cannot agree for itself — the server refuses a consent signed by the learner rather than their guardian. You can withdraw it at any time, and withdrawing removes their rows from the dataset.
They are five short optional exercises, each a minute or two — working memory, response inhibition, processing speed, sustained attention, and implicit sequence learning. They are research, they are never inserted into lessons, and their results are shown to the learner alone. Not to a teacher, not to an institution, and not to you.
A teacher sees the learners in a circle they teach, with the same figures and the same refusals. Neither of you sees anything the other cannot, and neither of you sees what your child wrote.
No webcam, no eye-tracking, no emotion or attention inference, now or later. What is recorded is what was answered, when, and how long it took.
Each child you manage has their own page — what their practice shows, what has faded, and what would help most this week.
A parent account is free, and the Lab reads the practice your child already does.
