Number Lines: Ordering Numbers [TEKS Tools Grade 8]

This post specifically looks at how number lines can be used solve problems involving ordering rational and irrational numbers. Read more about TEKS Tools and their rationale here.

Number Lines

Number lines account for around 14% of each 8th grade STAAR test. These number lines are applied to solve problems related to rates, ordering numbers, similar shapes, and direct variation.

The main function of a number line is to solve problems involving rates, direct variation and proportionality, and to visualize ordering rational and irrational numbers. By visualizing these quantities on number lines, students can better make sense of the how the quantities are related.

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Ordering Numbers

8.2D - order a set of real numbers arising from mathematical and real-world contexts

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2023-18: an inequality is given, students had to find three values to make it true

2023-30: four values are given, students had to order them from least to greatest

2024-2: three values are given, students had to order them from greatest to least

2024-37: an value is given, students find two values that are greater

2025-4: four inequalities are given, students had to find the one that is true

2025-38: four values are given, students had to order them from least to greatest