8.NS.A.1: Irrational numbers; every fraction's decimal stops or repeats; turn a repeating decimal into a fraction

Know that numbers that are not rational are called irrational.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 8.

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How ColorMyMath teaches it

The number line keeps going: below zero, between the whole numbers, and far past 100. Every position is a place you can land on and see.

Every page is free and open — nothing to install, no account, and it works on a phone or a classroom board. Every number has its own color: 1 red, 2 orange, 3 yellow, 4 green, 5 blue, 6 purple, 7 brown, 8 pink, 9 cyan, and a number is that many colored dots.

More Grade 8 standards in The Number System

• 8.NS.A.2Squeeze square roots between decimals to place them on a number line, compare and estimate (√2, √50, π)

ColorMyMath · getridoftheteacher.com · every number has its own color, and a number is that many colored dots. Matching a game to a standard is a judgement call; the official text is at doe.mass.edu.