Grade 4 math, unit by unit

How do you teach fourth grade math, from place value to fractions?

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Fourth grade is where arithmetic starts to carry real weight, and each skill here begins as a drawing before it becomes digits. Grade 4 Mathematics: Place Value, Operations, and Fractions has eight units and 22+ hours, aligned to the Common Core. Boxes, bars and number lines come first, so your child always has something to point at.

The eight units

Place Value to One Million. Multi-Digit Addition and Subtraction. Multiplicative Comparison and Multi-Step Problems. Multi-Digit Multiplication. Division with Remainders. Factors, Multiples, and Patterns. Fraction Equivalence, Operations, and Decimal Notation. Measurement Conversion, Angles, and Classifying Shapes.

What a 5 is worth

Unit 1 teaches your child to say that the 5 in 458,201 is worth 50,000, and to compare numbers by place value instead of by how many digits they have. They round on a number line with only two benchmarks marked, such as 400,000 and 500,000.

Boxes, then the algorithm

Unit 4 teaches multiplication with an area model, breaking each factor into tens and ones and adding the partial products. The standard algorithm arrives later as a shortcut for boxes your child has already drawn many times. Unit 5 then runs the boxes backwards, so long division becomes a record of finding a missing side.

How many more is not how many times

Unit 3 separates additive comparison from multiplicative comparison. Your child draws a bar model first, and the picture decides the operation, not a keyword.

The biggest unit is fractions

Unit 7 is 32 days. Your child moves from equivalent fractions on a bar to unlike denominators, adding like denominators, a whole number times a fraction, and decimals as tenths and hundredths on a grid before any decimal point appears.

Angles and shapes by property

The last unit converts units, measures angles with a protractor and treats an angle as a fraction of a circle. Your child classifies quadrilaterals by parallel sides and angle type instead of by how they look.

What this is not

It is not a supplement. The guide plans 50 minutes, five days a week, all year, and notes that Units 7 and 8 together take nearly 70 of roughly 170 days.
It is not a course where checking the answer key is enough. The guide flags sticking points where a right-looking process hides a wrong idea, and says the cumulative review days are where they get exposed.
It is not a course to skip around in. The guide says swapping units means meeting a picture or vocabulary mid-unit that was never taught, and you end up backtracking anyway.

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Before your child starts: what we collect and why

We collect only what it takes to teach your child: the first name and sign-in you choose, their answers and progress, and their chat with Clara (written by Anthropic's AI, read aloud by OpenAI). Nobody trains AI on it or sells it, and you can see or delete it any time. You create your child's account yourself. Ticking the box below is how you, as the parent, give consent.

Read what we collect and why

Your consent is needed before we collect anything from your child, and we collect nothing without it. You create your child's account yourself; they never sign up alone.

What we collect from your child: the first name and sign-in you choose, their answers, time on lessons and progress, and their chat with Clara. Used to run the lessons, build their transcript and show you how they are doing.
Who else handles it: Anthropic writes Clara's replies from the chat, the lesson and your child's first name. OpenAI turns lesson text and Clara's replies into the read-aloud voice. Spoken answers are turned into text on our own server and never sent anywhere. Our email provider sends you reports. Nobody sells your child's data or uses it for anything else.
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Questions parents ask

What should my child know before starting?

Write 342 in words and 706 as a number, answer 7 x 8, 9 x 6 and 48 / 6 in a few seconds, do 245 + 138 and 500 - 240 on paper, shade 3/4 and place 1/2 on a number line, and find the area of a 4-by-6 grid.

What does a day look like?

A few minutes looking at a picture together, a couple of problems side by side, then your child works on their own while you are nearby. On most days your job is checking against an answer key.

What do I need to gather?

A place value chart, base-ten blocks or a picture of them, and a blank number line. Later units add a protractor for angles.

What does it cost?

$29 a month or $290 a year for every child. The first 30 days are free with no card.

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