Subject Area Lessons

## #1108. Algebra I - Graphing

Mathematics, level: Senior
Posted Fri Jun 25 08:22:36 PDT 1999 by Cindy Wilson (Cindy301@aol.com).
Expo High School-Waterloo Comm., Waterloo, Iowa
Materials Required: Computers, LCD projector,Alge-Blaster Plus! software,Algebra I book, worksheet
Activity Time: one day
Concepts Taught: Graphing concepts

Graphing Lesson Plan (Algebra I - sec. 9-1)

Content - Graphing ordered pairs
Grade level - 9 to 12
Teacher - Cindy Wilson
Date - June 24, 1999

Resources Needed: Algebra I book, computers, Alge-Blaster Plus! Software, LCD projector, worksheet
Classroom Arrangement: instructor computer with projector and at least 8 student workstations.
Lesson Plan Duration: 1 day

Anticipatory Set:
Students will be introduced the concept of ordered pairs through the following activity.
Identify the student sitting in the 3rd seat of the 1st row of desks in the classroom. Tell the student that they will now be identified as (1,3). Identify the student sitting in the 1st seat of the 3rd row as (3,1). Challenge students to identify the procedure you are using to name the other students (the 1st # is for the row and the 2nd # is for the desk). Then have each student name their new identity based on their seat assignment. Notice (1,3) and (3,1) do not name the same student. (1,3) and (3,1) are called ordered pairs because the order in which the pair is written is important.

Objectives and Purposes:
1. Graph ordered pairs on a coordinate plane.
2. Write the ordered pair for a given point.
3. Name the quadrant in which a point is located.

Input:
1. Modeling-teacher will use the computer to show how to graph an ordered pair, how to write the ordered pair for a given point and how to name the quadrant. Discuss why moves for positive numbers are right or up and moves for negative numbers are left or down. The first number or coordinate of an ordered pair corresponds to a number on the x-axis. The second number corresponds to the number on the y-axis. When plotting a point you always use the first number to go across and then the second number to go up or down. The two together form the point on the graph.
2. Check for Understanding-have students take turns coming up to the computer to plot points, find points, etc.
3. Guided Practice-have students pair up in groups of two and go to a computer and do the practice exercises together.
4. Independent Practice-assign as homework a worksheet covering the lesson.

Closure:
Review with the students the material covered for the day by doing a quick mix practice. Assign the homework assignment that is due the next day. Give a short overview of the next day's lesson. 