Lesson Notes By Weeks and Term - Senior Secondary 2

Pictorial views 2

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TERM – 1ST TERM

WEEK TEN

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Technical Drawing

Topic: PICTORIAL VIEWS 2

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

I.) Define orthographic projection                        

II.) Differentiate between first angle Projection and third angle projection.

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

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher explains the meaning of orthographic projection

Students listens attentively to the teacher                                                                         

STEP 2

EXPLANATION

Teacher discusses the difference between first and third angle Projection..

Students exhibit attentiveness and active engagement

STEP 3

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

PICTORIAL VIEWS 2

Orthographic drawing

An orthographic drawing represents a three-dimensional object using several two-dimensional views of the object. It is also known as an orthographic projection. For example, you can see in this image the front, top and side views of an aircraft.

Types of orthographic projection

First angle projections and third angle projections are the two main types of orthographic drawing, also referred to as 'working drawings'. The difference between first and third angle projection is in the position of the plan, front and side views.

  1. First Angle Projection: In first angle projection, the object is placed in the first quadrant (right-hand side) of the imaginary box, and the projectors are placed between the observer and the object. This means the object is projected onto a plane located between the observer and the object. It is commonly used in Europe and Asia.
  2. Third Angle Projection: In third angle projection, the object is placed in the third quadrant (left-hand side) of the imaginary box, and the projectors are placed behind the object. This means the object is projected onto a plane located behind the object. It is commonly used in the United States and Canada.

EVALUATION: 1.

 

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively