# Freehand Drawing and Sketching (Woodwork and Metalwork)

FIRST TERM e – LEARNING NOTES

Subject :Technical Drawing

Topic : Freehand Drawing and Sketching (Woodwork and Metalwork)

Class :SSS 3 (BASIC 12)

Term : FIRST TERM e – LEARNING NOTES

Week :WEEK 2

Instructional Materials :

• Measuring tools
• Drawing tools

Reference Materials

• Scheme of Work
• Online Information
• Textbooks
• Workbooks
• 9 Year Basic Education Curriculum

Previous Knowledge :

The pupils have previous knowledge of

Behavioural Objectives :  At the end of the lesson, the pupils should be able to

• define measuring tools
• mention at least four measuring tools
• enumerate the importance of Freehand Drawing and Sketching (Woodwork and Metalwork)
• list drawing tools
• differentiate the difference between the two tools

Content :

CONTENT: (a) Principles of freehand sketching.
(b) Freehand sketching of hand tools used by builders and engineers e.g. hammers pliers, saws, trowels, callipers etc.

Sub-topic 1: PRINCIPLES OF FREEHAND SKETCHING

What is free hand sketching?
Freehand sketching is the method of drawing figure without the use of precision instruments such as scale rule. This practice includes both pictorial and orthographic sketches of engineering components, electrical circuits and plan layouts. The principles of free hand sketching are hereby explained below:
(i) The paper should not be too large and should not be fixed on a drawing board.
(ii) Horizontal lines are better drawn from left to right noting the two end points. Do not replace the lines; finished lines must be hard and clean; use eraser as much as you need it but do not try to imitate mechanically drawn straight lines since slight ripples and deviations are slight part of freehand sketching.
(iii) Note the distinction between thick and thin lines, such as outlines/object lines, centre lines, dimension lines, hidden details line etc.
(iv) Angles are quite closely approximated. For right angles use vertical and horizontal lines on the square paper.
(v) For circles and arcs, use simple geometrical constructions. Draw the centre lines and two 450 radial lines, estimate the radius and draw the curve joining the points on the lines, smaller circles and arcs may be drawn without such constructions.

EVALUATION:
(i) Define free hand sketching.
(ii) Enumerate the principles of free hand sketching.
(iii) Mention five tools you can draw using free hand sketching.

Sub-topic 2:FREEHAND SKETCHING OF HAND TOOLS USED BY BUILDERS AND ENGINEERS

The teacher to guide students in making a Free hand sketch of these tools:

1. MARKING TOOLS

1. DRIVING TOOLS

Ball peen hammer
Framing hammer

Stock hammer
Mallet

Sub-topic 3:FREEHAND SKETCHING OF HAND TOOLS USED BY BUILDERS AND ENGINEERS
The teacher to guide students in making a Free hand sketch of these tools:
2. HOLDING TOOLS

G-clamp Bench-vice Hand vice

3. MEASURING TOOLS

EVALUATION:
Make some free hand sketch of the tools as given by the teacher.
Sub-topic 4:FREEHAND SKETCHING OF HAND TOOLS USED BY BUILDERS AND ENGINEERS
The teacher to guide students in making a Free hand sketch of these tools:
4. CUTTING TOOLS

5. CIRCUIT SYMBOLS

Presentation

The topic is presented step by step

Step 1:

The class teacher revises the previous topics

Step 2.

He introduces the new topic

Step 3:

The class teacher allows the pupils to give their own examples and he corrects them when the needs arise

Evaluation :

• compare sketching tools and drawing tools
• explain the uses of two drawing tools
• write out four drawing tools
• discuss the use of two sketching tools
• itemize and write out five sketching tools

Conclusion :

The class teacher wraps up or conclude the lesson by giving out short note to summarize the topic that he or she has just taught.

The class teacher also goes round to make sure that the notes are well copied or well written by the pupils.

He or she does the necessary corrections when and where  the needs arise.

Assignment :