Miami Central Senior High School
Algebra 1 (Honors)
2010-2011
Lesson Plan
GRADE 9th Algebra 1
Date ___12/15/2010___
TEACHER OBJECTIVES:
The teacher will provide the student an opportunity to:

Provide a clear explanation of how to recognize slopes of parallel and perpendicular
lines and effectively differentiate instruction to meet all student learning needs
STUDENT LEARNING GOALS: (given to student)
After this lesson you will:
Write the equation of a line that passes through a point that is
parallel/perpendicular to a given line.
SUNSHINE STATE STANDARDS:
Body of Knowledge: ALGEBRA
Standard
Linear Equations & Inequalities
Objective(s)
Student will understand the concept of parallel and perpendicular
lines and the relationship of their slopes
NGSSS
MA.912.A.3.10
MA.912.G.1.4
PREPARATION
Discuss Key Vocabulary Terms (reciprocals, parallel, perpendicular)
MATERIALS
Graph Paper
Geo Sketchpad
Protractor (angle measures)
Discoverylearning.com
Essential Questions
The following key questions are addressed in this lesson:
1. What is connection between the slopes of two parallel lines?
2. How can you distinguish between the slopes of two lines that are perpendicular as
opposed to two lines that are parallel?
Key Vocabulary
Parallel
Perpendicular
Slope
Point-Slope Form
Slope-Intercept Form
Multiplicative Inverse
Y-Intercept
Reciprocal
Ordered Pair
CLASS OPENING
Graph a linear equation
Use Geo Sketchpad to introduce the concepts of parallel/perpendicular lines and
their slopes.
Discuss Key Vocabulary
AGENDA
Do Now: Graph linear equations and discuss the different components of an
equation written in slope-intercept form.
Discussion: Introduction of parallel and perpendicular lines and their slopes
Geo Sketchpad: Graph parallel and perpendicular lines given
Topic
“_Parallel and Perpendicular Lines_”
Activities
Students will be given an equation in slope-intercept form. They will have to
construct a line parallel to the given equation that passes through a given point.
Students will be given an equation in slope-intercept form. They will have to
construct a line perpendicular to the given equation that passes through a given
point.
After students construct the lines for both parallel and perpendicular lines, the
student should be able to graph and write the equation of parallel and perpendicular
lines.
Extention Activity: Students who are able to complete the prior activities will be
given problems in standard form to graph.
Home Learning Assignment
If students did not complete the classroom practice, students were required to complete the
assignment at home.
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Grade 9 (Perpendicular and Parallel lines)