For Parents/Math

Math for Parents

10 minutes a day. No guesswork.

Lumastery finds where your child actually is, builds a daily session at exactly the right level, and shows you what they've mastered. You never have to wonder if you're doing it right.

Free Tools

No account needed. Start immediately.

View all →

Placement Test

Find your child's actual level in 5 min

Skill Checklist

Math skills by grade level

Age Quiz

What should my child know?

Want to go deeper?

Teaching guides, concept explainers, and curriculum reviews. These also show up inside daily sessions when your child hits a topic.

Grade level

Topic

4 articles about Decimals

How to Teach Place Value with Decimals

Decimal place value extends the same system your child already knows — but to the right of the decimal point. Here is how to teach it so tenths and hundredths feel as natural as tens and hundreds.

3 min read3rd–5th
Place ValueDecimals

What Is a Decimal?

A clear explanation of decimals — what they are, how they relate to fractions, and why the decimal point matters.

2 min read3rd–4th
Decimals

How to Teach Decimals (Connecting Fractions to Place Value)

Decimals are not a new number system — they are fractions written in place value notation. Here is how to teach decimals so your child sees the connection and does not treat them as a separate topic.

4 min read3rd–4th
Decimals

How to Teach Decimal Operations (Add, Subtract, Multiply, Divide)

Decimal operations follow the same rules as whole number operations — with one added challenge: the decimal point. Here is how to teach all four operations with decimals.

3 min read4th–5th
Decimals

Let the system handle the daily math

Lumastery teaches, adapts, and tracks mastery for each child automatically. You stay informed with weekly reports.

Join the Waitlist