SEMI – DETAILED LESSON PLAN IN ALGEBRA I

Secondary Level

Electronics Education and Application of Information Technology to Educational management (PhD 804)

Submitted by:

ROLLY R. PEREZ

MADELENE T. AMANTE

PhD Students

Submitted to:

MARIA MANUELITA T. PAJE

Professor

This plan touches on the Multiple Intelligences concept that says that not all students learn the same way. All students learn 'best' using their different intelligences.

SEMI – DETAILED LESSON PLAN IN ALGEBRA I

Secondary Level

I. Objective : At the end of an hour session, the students should be able to:

1. find the absolute value of a number.

2. solve linear equations with absolute value.

II. Subject Matter: Equations with Absolute Value

References: AAA Sudoku http://www.321know.com/sudoku.html

Pearson Prentice Hall Mathematics Video on Absolute Value

(http://www.phschool.com/atschool/academy123/html/bbapplet_wl-problem-430700.html).

http://www.aaamath.com/g76-absolute-value.html

http://www.phschool.com/atschool/academy123/html/bbapplet_wl-

problem-430978.html http://www.phschool.com/atschool/academy123/html/bbapplet_wl-problem-431607.html.

http://www.howe-two.com/mathematicat/qabsolute.html

http://www.analyzemath.com/AbsEqIneq/AbsEqIneq.html

Materials: Computer

LCD Projector

Strategy: Mastery Lecture

Multiple Intelligence Approach

Musical Intelligence

Visual Intelligence

Interpersonal Intelligence

Intrapersonal Intelligence

Kinesthetic Intelligence

Logical Intelligence

Linguistic Intelligence

III. Introductory Activities

A. Drill

The teacher present a mathematical game to the students (Sudoku) at AAA Sudoku (http://www.321know.com/sudoku.html). Each student shall be given only 5 minutes to do the puzzle.

B. Review

Review the definition of absolute value being the distance from zero on the number line at Pearson Prentice Hall Mathematics Video on Absolute Value (http://www.phschool.com/atschool/academy123/html/bbapplet_wl-problem-430700.html).

C. Lesson Proper

1. Motivation

The teacher will group the students into two. Then the teacher will present a game on absolute value of a number. Each student will be given 60 seconds to do the game http://www.aaamath.com/g76-absolute-value.html. In this game, student who got the highest score will be declared as winner.

2. Presentation

We need to think about what value(s) are 10 units away from zero on the number line. Using the definition of absolute value there will be two equations that we will need to set up to get rid of the absolute value, because there are two places on the number line that are 10 units away from zero: 10 and -10.

First equation:

*Setting inside linear expression = to 10 *Inv. of add. 2 is sub. 2 *Inv. of mult. by 7 is div. by 7

Second equation:

*Setting inside linear expression = to -10 *Inv. of add. 2 is sub. 2 *Inv. of mult. by 7 is div. by 7

There are two solutions to this absolute value equation: 8/7 and -12/7.

When we plug 8/7 in for x, we end up with the absolute value of 10 which is 10. When we plug -12/7 in for x, we end up with the absolute value of -10 which is also 10.

Be careful on this one. It is very tempting to set this up the same way we did problem 1 above, with two solutions. However, note that the absolute value is set equal to a negative number. There is no value of x that we can plug in that will be a solution because when we take the absolute value of the left side it will always be positive or zero, NEVER negative. Answer: No solution.

3. Discussion

For further discussion, the teacher will ask the students to view a video presentation on Equations with Absolute Value http://www.phschool.com/atschool/academy123/html/bbapplet_wl-problem-430978.html and http://www.phschool.com/atschool/academy123/html/bbapplet_wl-problem-431607.html.

4. Generalization

Why is it that the absolute value of a number is always

positive? “Absolute value

indicates the distance from zero.”

How to solve equations with absolute value? “ Get rid of the absolute value symbol, then solve the equation by finding the value of the unknown variable.”

5. Application

The teacher will ask the students to answer practice exercises at http://www.howe-two.com/mathematicat/qabsolute.html.

IV. Evaluation

§ The teacher will ask the students to answer questions at http://www.analyzemath.com/AbsEqIneq/AbsEqIneq.html.

V. Assignment

Write your learning insights in the form of a poem on the topic Equations with Absolute Value. Send your answer at madelenebt@yahoo.com.