Week 4: Orthographic Projection

Topic: Orthographic Projection

School: Mont Roches training centre

Date: 11/06/12

Prior Knowledge: Lines and Orthographic/Isometric Projection

Duration: 80 minutes

Time: 1030-1145

Number of students: 20

Aim: 

To teach students how to draw the Front and Top views from an isometric block.

Teaching Aids:

  1). Marker of different colours

  2). Isometric grid Bristol paper

  3). Square grid Bristol paper

.

  4). Design and Technology- Book 1 (NCCRD)

 Location: Theory classroom

Preparation: 

1. Class setting

2. Drawings of one shaped block on isometric Bristol paper.

Learning Outcomes

At the end of the lesson the students should be able to:

  1. Read and write the three main dimensions; width, height and depth from an isometric   drawing.

  2. Draw the front and top views from a given isometric shaped block.

 Procedures

Step 1- (5 mins)

Welcome students and gain their attention to start the class.

Take attendance of students

Step 2- (15 minutes)

- Introduction to Orthographic Projection.

- Explain on specific uses of Orthographic Projection as for example in layout of a building

- Pupils' participation is encouraged by simple questions and answers.

Probable questions to pupils:

 Ø  Have you ever seen the building plan of your house?

 Ø  What is the position of blackboard and windows in your class.?

Step 3- (10 minutes)

Refer to the drawing of the isometric block and explain:

  1)  The position of the viewer

  2)  The two views- Front and Top views

  3)  The three main dimensions namely width, height and depth.

Step 4- (10 minutes)

Refer to the drawing of the isometric block and:

  Write the dimensions (W, H and D) on square grid board with the participation of the pupils. Draw the crate and add details of the front view according to dimensions-width and heightDraw the crate and add details of the top view according to dimensions-width and depth.

Stress on the drawing positions of the F.V and T.V.

Step 5- (15 minutes)

Class work 1 - copy explanation set on isometric and orthographic boards.

Checking and evaluating students work by walking around the class.

Step 7- (10 minutes)

Summarise the lesson by revisiting the topic covered. Homework - DT book 1 page 59 Number 2 and 4.