generalGrades 8

Grade 8 Lesson Plans

Create free printable math lesson plans for 8th grade. Standards-aligned lesson plans for linear functions, systems of equations, geometry, and statistics. Perfect for teachers and tutors.

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Understanding Linear Functions

Grade: 8thTopic: Algebra & Expressions

Learning Objectives

  • Understand functions as input-output relationships(8.F.A.1)
  • Graph linear functions from equations(8.F.A.3)

Materials Needed

  • Graph paper (3 per student)

Warm-Up Activity

5-10 min

Introduction

  • Machine: Input x, output 2x + 1. What outputs for 0, 1, 2, 3?

Main Lesson / Direct Instruction

15-20 min

Direct instruction

  • Function: each input has exactly one output
  • y = mx + b: m is slope, b is y-intercept
  • Graph by plotting points or using slope-intercept

Guided Practice

10-15 min

Guided work

  • Graph y = 2x - 3, y = -x + 4

Independent Practice

10-15 min

Individual practice

  • Graph linear functions
  • Write equations from graphs

Assessment

Formative:
  • Check graphing
Summative: Graph y = -2x + 5 and identify slope and y-intercept

Closure

5 min
  • What makes a relationship a function?
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