TERM – 3^{RD} TERM
WEEK EIGHT
Class: Junior Secondary School 3
Age: 14 years
Duration: 40 minutes of 5 periods each
Date:
Subject: BASIC TECHNOLOGY
Topic: DRAWING PRACTCES –OBLIQUE DRAWING
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,
demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures, mathematical sets, drawing instruments
INSTRUCTIONAL PROCEDURES
PERIOD 1-2
PRESENTATION |
TEACHER’S ACTIVITY |
STUDENT’S ACTIVITY |
STEP 1 INTRODUCTION |
The teacher explains the meaning of oblique projection. |
Students pay attention |
STEP 2 EXPLANATION |
Teacher discusses the types of oblique projection. |
Students pay attention and participate |
STEP 3 DEMONSTRATION |
Teacher guide students to construct simple objects in oblique views |
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
DRAWING PRACTCES –OBLIQUE DRAWING
Oblique projection is a simple type of technical drawing of graphical projection used for producing two-dimensional (2D) images of three-dimensional (3D) objects.
Types of Oblique Projection
Following are the types of oblique projections according to construction.
This kind of drawing is typically created using oblique projection. In this diagram, the third axis is at a 45° angle to the horizontal line, with the first two axes being vertical and the third being horizontal.
In this diagram, the third axis is at an angle of between 30 and 60 degrees to the horizontal line, with the two other axes being vertical. Such a drawing closely mimics the original picture. The scale on the inclined plane is 1/2 or 2/3 of the actual size, whilst the dimensions on the horizontal and vertical axes are given from the true scale.
Normal oblique drawings use depth lines that are only three-fourths the length of the depth established by the three-view drawing
Procedure for oblique projection
Creating an oblique drawing involves these steps:
EVALUATION: 1. What is oblique projection?
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively