CCSS.Math.Content.HSA-SSE.B

MathGrades 9–12Seeing Structure in Expressions

Standard Cluster

Write expressions in equivalent forms to solve problems

Common Core State Standards for Mathematics · High School — Algebra

Cluster contents

Standards in This Cluster

CCSS.Math.Content.HSA-SSE.B is a cluster heading. These are the individual standards under it.

Teacher's field guide

What This Cluster Means

What Students Need to Do

Students transform algebraic expressions without changing their values. They factor, expand, complete the square, and use exponent rules to reveal zeros, maximum values, rates, or repeated growth.

What Mastery Looks Like

A student chooses a form that makes the needed information easy to find. The student rewrites accurately, solves the problem, and explains why the new form is equivalent and useful.

Common Misconceptions

Students may think a rewritten expression can have a different value from the original. Common errors include sign mistakes when factoring, incorrect exponent rules, and confusing zeros with coefficients.

How to Assess It

Exit ticket: A ball’s height is h(t) = -16t² + 64t + 80. Rewrite h(t) in factored form, find when the ball hits the ground, and explain why that form helps.

Lesson moves

Ways to Teach It

  1. Use algebra tiles to build x² + 7x + 12, rearrange them into a rectangle, and record the factored form.

  2. Compare 2(x - 3)(x + 1), 2x² - 4x - 6, and 2(x - 1)² - 8, then write what each form reveals.

  3. Play a card-matching game with expanded, factored, and completed-square forms, requiring students to verify each match by calculation.

  4. Give a projectile height formula and have students rewrite it to find the launch height, maximum height, and landing time.

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Printable HSA-SSE.B Worksheet

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