Algebra I Lesson

How Far From Zero? Absolute Value in the Real World

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8th or 9th GradeThin-SlicingCCSS.MATH.CONTENT.HSA.REI.B.3, CCSS.MATH.CONTENT.6.NS.C.780 min

Learning Objective

Students will evaluate absolute value expressions, solve absolute value equations, and apply absolute value to real-world distance and tolerance contexts.

Lesson Overview

Students progress from evaluating simple absolute value expressions to solving and applying absolute value equations in real-world contexts, using a thin-sliced VNPS sequence that builds one layer of complexity at a time.

Materials

Vertical whiteboards or large chart paper
Dry-erase markers (multiple colors)
Random grouping tool (e.g., cards or app)
Number lines posted or drawn on boards
Printed task cards (one per group per round)
Rulers or meter sticks (for launch hook)

Scaffolded Task Progression

1Task 1

Evaluate each expression. No variables — just compute!
a)

∣ - 7 ∣

∣4∣

∣ - 12 ∣

∣0∣

2Task 2

Evaluate and then ORDER the results from least to greatest.

∣ - 9 ∣

∣3∣

∣ - 1 ∣

∣7∣

∣ - 7 ∣

3Task 3

True or False? Explain your reasoning on the board.
a)

∣ - 5 ∣ = ∣5∣

∣ - 3 ∣ > ∣2∣

∣ - 8 ∣ < ∣ - 10 ∣

∣ x ∣

is always positive.

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