How an AI tutor decides how much to explain

TL;DR:

• A good tutor starts by finding out where you are stuck, not by explaining everything.

• It gives one step at a time and checks that you followed before going on.

• You can steer it: say what you know, what you want, and when to slow down.

A common problem with explanations is that they come in the wrong size. Too short, and you are lost. Too long, and the one step you needed is buried in ten you already knew. A good tutor, human or AI, tries to fit the explanation to the gap in front of it.

This article looks at how that fitting works, using one stuck student as the example, and at what you can do to help.

The goal: fill the gap, not the page

Think of what you know as a ladder with a missing rung. Explaining the whole ladder wastes time, and explaining the wrong rung does not help. The job is to find the missing rung and put it in, then check that you can climb it.

Walk-through: a student stuck on one step

The problem: solve x/4 + 2 = 5. The student says: "I do not get it."

1. Find out where: The tutor asks: "Which step is the first one you are unsure about?" The student: "I do not know what to do with the 2 and the fraction."

2. Ask what they know: "If you had x + 2 = 5, what would you do?" The student: "Subtract 2." That shows the idea of undoing addition is fine.

3. Give one step: "Do the same here. Subtract 2 from both sides." The student gets x/4 = 3.

4. Stop and check: "What is x/4 saying in words?" "x split into four equal parts is 3." Good, the meaning is there.

5. Next step: "What undoes dividing by 4?" "Multiplying by 4," so x = 12.

6. Verify: 12/4 + 2 = 3 + 2 = 5. It matches.

The tutor never explained fractions or equations from the beginning. It asked, found that one rung was missing (how the fraction fits the same pattern), and supplied just that.

The signals a tutor uses

• What you say. Specific confusion like "I do not get the 2" tells more than "I do not get it".

• What you got right. A correct sub-step shows what you can already do.

• How you answer. Quick, correct answers say to speed up. Hesitation or wrong answers say to slow down.

• What you asked for. If you ask for the answer, a tutor can give it, but it can also offer a hint first.

What you can do to help

You steer the amount of explanation by saying a few things:

1. Say what you already know: "I can solve x + 2 = 5."

2. Say where it goes wrong: "I get lost when the fraction shows up."

3. Say how much you want: "Just the next step", "the whole method", or "a similar example".

4. Say when it is too fast: "Slower", or "say that again another way".

Why one step at a time works

Your working memory, the space you use for holding things while you think, is limited. An explanation with five new ideas at once can overflow it, so none stick. Giving one idea, then checking it, keeps each piece inside what you can hold, and builds up a solid base for the next.

Pacing within a single session

Over a session, a good tutor shifts its pace. Early on it asks more and says less. When you start getting steps right quickly, it gives bigger steps and fewer checks. If you stumble, it shrinks the steps again. You can see this as a kind of gear change, and you can ask for a gear change yourself by saying "bigger steps" or "smaller steps".

The same applies across days. If you have shown you know a topic, a good tutor should not make you go through it again from the start.

What a tutor still cannot do

An AI tutor only knows what you tell it and what it can see. If you say "I get it" to be polite, it will move on. If your confusion is about something earlier that you do not mention, it may miss it. Honest answers are the most useful input you can give. Saying "I am not sure" is not a failure, it is exactly the information needed.

Note: Be honest about what you do not follow. A tutor cannot adjust to something you do not say.

Privacy and control

DuckyHelper can see your work on screen while the pill is open, and draw on it to show the spot. The blackboard works a problem out with you, one step at a time. It remembers you, so over time it can fit explanations to what you already know.

Try it yourself

Pick a topic you half understand and ask your tutor to start by asking you questions. Answer honestly, including "I am not sure". Count how many steps it takes to reach the gap. You will often find it is one or two, not the whole topic.

Frequently asked questions

What if the tutor goes too slowly?

Say so: "I know this part, skip ahead." A good one will adjust.

Why does it ask me questions instead of just explaining?

Your answers show where the gap is, which keeps the explanation short and relevant.

Can it tell when I am confused?

Only from what you say and do. Tell it directly when something does not make sense.