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Grade:
MiddleSubject:
Mathematics |

Posted Thu Apr 28 16:24:27 PDT 2005 by Ashley Crippen (aecrippen@rmwc.edu).

Randolph-Macon Woman's College, Lynchburg, USA

Materials Required: handouts with pictures of slopes, worksheets, wooden triangle, trasparency, overhead, calculators

Activity Time: 30 minutes

Concepts Taught: finding the slope, describing the slope, determining the slope given an equation, graphing

Subject: Math (specifically slopes of lines)Goals: The student will understand how to determine the slope of a line when given an equation of a line or the graph of a line.

Rationale: To provide exposure to real life experiences that utilize math concepts.

Objectives: TSWBAT

Find the slope of a line

Describe the slope as positive or negative

Determine the slope given an equation in slope intercept form

Graph a line with a given slopeStandards: SOL A.7

Ability Levels: 9th grade students or varying abilities

Set/Introduction:

What comes to your mind when you think of the word "slope"?

Where do you see slopes in the real world?

-Jot down ideas on the board.

Pass out pictures of slopes to each student.

Have students come to the board and plot the line of their picture using an estimate of points located on the line.Procedures:

So what exactly does slope mean in mathematical terms?

Positive vs. negative slopes

-how to determine whether a slope is positive or negative

Determining the slope:

Given a graph.

-use two examples already on the board

*hands-on example on overhead.

ask for volunteer to plot points.

Given an equation:

-slope-intercept form

-one teacher-led example, one student-led example

-general equation

-one teacher-led example, one student-led example

Pass out worksheet for practice on determining slope from graphs and equations

Ask for volunteers to do problems 1-3.

Pass out graph paper for practice on graphing slope.Time Required: 30 minutes

Materials:

Handouts with pictures

Worksheets

Wooden triangle, transparency, overhead projector

Calculators?Activity:

Graphing the lines/slopes of the pictures on the board

Practice worksheetGuided Practice:

Examples done on the board

-What is slope?

-Positive vs. negative

-Determining slope using a graph or equation

-slope-intercept form/general formTechnology:

Overhead projector

Computer/Internet

CalculatorsHomework:

Completion of worksheetAssessment/Evaluation:

Personal observations

Completion of worksheet

Ability to graph on board