Lesson Notes By Weeks and Term - Senior Secondary 2

Term: 1^st Term

Week: 7

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 2 periods each

Date:

Subject:      Computer Studies and ICT

Topic:-       Logic circuits

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Construct truth table for the gates
2. Write logic equations

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, pictures, Data Processing for senior Secondary Education by Hiit Plc, WAPB Computer Studies for Senior Secondary II by Adekunle et  al, On-line Materials.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION	TEACHER’S ACTIVITY	STUDENT’S ACTIVITY
STEP 1 INTRODUCTION	The teacher reviews the previous lesson on symbols of logic gates	Students pay attention
STEP 2 EXPLANATION	He outlines the guidelines for constructing the truth table for each gates and actually constructs one	Students pay attention and participates
STEP 3 DEMONSTRATION	He explains how to write logical equations	Students pay attention and participate
STEP 4 NOTE TAKING	The teacher writes a summarized note on the board	The students copy the note in their books

 

NOTE

CONSTRUCTION OF TRUTH TABLE FOR THE LOGIC GATES
The truth table is the table that shows the possible combinations of variable values in the equation and the result (output) for each of the logic gates.

For a two-input truth table, there will be 4 (2²) possible combinations of variable inputs and generally for n-input truth table, there will be 2ⁿ possible combinations of the input variables. See the examples below:

 

EVALUATION:    1. An OR gate has 3 inputs and 1 output. Show the truth table for this OR gate.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively