For parents & caregivers

The method changed.
You can still help.

A math method can look different from the one you learned. These guides help you follow your child’s work.

Choose a method, follow a worked example, then try a free practice lesson together.

Start with the one on your child’s page

Commonly taught in Eureka Math and EngageNY, kindergarten through grade 3.

What is a number bond, and why is the whole on top?

A number bond is a small diagram: the whole number sits in a circle at the top, and the parts it is made of sit in circles underneath, joined by lines. It shows that a number can be taken apart and put back together. Children use it to make ten while adding, and it is the same whole-and-parts idea they meet again in algebra when they solve x + 7 = 12.

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Commonly taught in Eureka Math and EngageNY and in most US elementary programs, grades 1–4.

Why is my child moving numbers around instead of just adding?

Make ten and compensation are ways of rewriting a problem so the adding happens in your head. You shift a small amount from one number to the other to land on a friendly number — 10, 100, or a whole ten. The total does not change, and being able to say why is the part the page is testing.

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Commonly taught in Eureka Math, EngageNY and Illustrative Mathematics, grades 4–5.

Why does my child draw a rectangle to multiply?

That rectangle is the area model. It splits a multiplication into four smaller multiplications you can do in your head, then adds them. It is the same arithmetic you learned — it just shows where each part of the answer comes from.

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Commonly taught in Eureka Math, EngageNY and Illustrative Mathematics, grades 4–6.

Why is my child subtracting over and over to do division?

That column of subtractions down the side of the page is partial quotients. Instead of finding one digit of the answer at a time, your child subtracts a large, easy multiple of the divisor, writes down the multiple used, and repeats until nothing is left. The multiples written on the side are added at the end to get the quotient. It is the same answer you would get from long division.

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Comes from Singapore Math — the Primary Mathematics series and Math in Focus — and is used widely in US schools, grades 2–6.

What are those bars my child draws for word problems?

A bar model is a rectangle drawn to hold the numbers in a word problem and show how they relate. One bar can stand for a whole that is split into its parts, or two bars can be placed one above the other to compare two amounts. The drawing turns the sentence into something the child can do arithmetic on.

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Commonly taught in Eureka Math and EngageNY, grades 6–7. The same strip of equal parts appears in fraction and percent problems in grades 4–6.

Why does my child draw a strip of boxes for a ratio problem?

That strip of boxes is a tape diagram. Each box is one equal part, and the ratio tells you how many boxes to draw. You find what one box is worth, then multiply. It is a picture of the sharing, not a different kind of arithmetic.

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A little help with helping.

The method is the lesson

When the working is shown, the child can see exactly which step to change. That is the same idea as our lessons: an attempted answer, a principle, then one next step.

You do not have to be the teacher

You need one good question — “what is this part measuring?” — not a working knowledge of the current curriculum. Every guide below ends with what you can usefully say.

These guides describe methods as they are commonly taught; your child’s teacher or school may use different names for the same steps. Treat them as a starting point for a conversation, not a replacement for your teacher’s guidance.

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