MATHEMATICS LESSON PLAN GRADE 8 - Holy Cross School

MATHEMATICS LESSON PLAN GRADE 8

TERM 2: APRIL ? JUNE

PROVINCE: DISTRICT: SCHOOL: TEACHER'S NAME: DATE: DURATION:

1 Hour

1. TOPIC: ALGEBRAIC EXPRESSIONS: EXPAND AND SIMPLIFY ALGEBRAIC EXPRESSIONS (Lesson 3)

2. CONCEPTS & SKILLS TO BE ACHIEVED: By the end learners should know and be able to use commutative, associative and distributive laws for rational numbers and laws of exponents to add and subtract like terms in algebraic expressions.

Grade 8 Lesson Plan: 1+4 Intervention ? Term 2 ALGEBRAIC EXPRESSIONS: EXPAND AND SIMPLIFY ALGEBRAIC EXPRESSIONS (Lesson

3) (Draft)

3. RESOURCES:

DBE Workbook, and Sasol-Inzalo Book 1, textbooks.

4. PRIOR KNOWLEDGE:

? like and unlike terms ? exponents ? coefficients ? conventions ? commutative and associative properties

5. REVIEW AND CORRECTION OF HOMEWORK (suggested time: 10 minutes)

Homework provides an opportunity for teachers to track learners' progress in the mastery of mathematics concepts and to identify the problematic areas which require immediate attention.

Therefore, it is recommended that you place more focus on addressing errors from learner

responses that may later become misconceptions.

6. INTRODUCTION (Suggested time: 10 Minutes)

Activity 1

Group the learners into small groups and give each group the following table or similar tables. Let the learners answer the questions that follows

332

53

8

22

-723

4

-332

63

-23

-9

122

? find in the table all the like terms. ? which term/terms cannot be grouped with any of the other terms(unlike). ? use the values in the tables to create different algebraic expressions where:

no like terms are added or subtracted. where like terms are added or subtracted. where like and unlike terms are added or subtracted. ? use the values to create a binomial with like terms. ? use the values to create a polynomial with like and unlike terms. ? Use the values to create a trinomial with unlike terms.

Let the groups give feedback on what they have found and created.

Grade 8 Lesson Plan: 1+4 Intervention ? Term 2 ALGEBRAIC EXPRESSIONS: EXPAND AND SIMPLIFY ALGEBRAIC EXPRESSIONS (Lesson 3)

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Activity 2 Let the teacher use some of the group's polynomials and show how to get equivalent answers.

Note: Ensure that the learners understand that it is the coefficients of the like terms that are being added, not the exponents of the variables.

7. LESSON PRESENTATION/DEVELOPMENT (Suggested time: 20 minutes)

Teaching activities

Learning activities (Learners are expected to:)

Activity 1

Let the learners do the following activity individually using ? complete the activity. commutative and distributive properties of numbers.

a) 14 + 12 + 62 + 6

b) 44 + 632 + 84 + 2223

c) 93 - 73

d) 312 + 17 - 212 - 6

e) 9 + 424 + 6 - 1542

f) (15 + 12) - ( 25 + 6 + 3)

Note: Emphasise that the way in which three or more terms are grouped when adding them does not change the answer.

Activity 2

? complete the activity

Let the learners do the following activities.

1. Sam is years old and his brother is three times his age. Write down an expression to show their total age.

(a) in 4 years' time

(b) in years' time

(c) in 3 years' time

Grade 8 Lesson Plan: 1+4 Intervention ? Term 2 ALGEBRAIC EXPRESSIONS: EXPAND AND SIMPLIFY ALGEBRAIC EXPRESSIONS (Lesson 3)

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2. Sipho buys three different domestic animals (goat, sheep and a cow). The goat and a sheep cost ( + ) rands. The cow costs triple the amount of the goat and the sheep. Write an expression that shows the total amount that the three domestic animals cost.

8. CLASSWORK (Suggested time: 15 minutes)

Sasol-Inzalo Book 1 Page 118 no. 7,9

9. CONSOLIDATION/CONCLUSION & HOMEWORK (Suggested time: 5 minutes)

(a) Emphasise that: ? an expression can have like and unlike terms. ? Like terms are terms that have the same variable(s) raised to the same power and constant. ? Only like terms can be added or subtracted

(b) The primary purpose of Homework is to give each learner an opportunity to demonstrate mastery of mathematics skills taught in class. Therefore Homework should be purposeful and the principle of `Less is more' is recommended, i.e. give learners few high quality activities that address variety of skills than many activities that do not enhance learners' conceptual understanding.

Carefully select appropriate activities from the Sasol-Inzalo Books, DBE workbooks and/or textbooks for learners' homework. The selected activities should address different cognitive levels.

Recommended Homework:

Sazol-Inzalo Book1, pg. 154, no 7

DBE Workbook 1, pg. 66, no. 3

Grade 8 Lesson Plan: 1+4 Intervention ? Term 2 ALGEBRAIC EXPRESSIONS: EXPAND AND SIMPLIFY ALGEBRAIC EXPRESSIONS (Lesson 3)

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