Lesson Notes By Weeks and Term v5 - Grade 8

Lesson Video

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Performance objectives

• Identify components of a communication system.
• Explain verbal, non-verbal, and visual communication.
• Apply principles of graphic communication.
• Analyze the effectiveness of graphic methods.
• Understand graphic communication in safety signage.

Lesson summary

Communication is fundamental to our daily lives. From simple conversations to complex systems transmitting information across the globe, understanding how communication works is crucial. Graphic communication, a subset of this broader field, focuses on conveying information visually. In South Africa, effective communication is essential for businesses, education, healthcare, and even maintaining social cohesion in our diverse society. For example, understanding visual symbols and diagrams is crucial for interpreting road signs, understanding safety instructions in factories, or even accessing online learning resources during periods of school closure.

Lesson notes

2.1 The Communication System: A communication system is a process that enables information to be transmitted from one place to another. Every communication system consists of the following elements: Sender (Source): The person or entity that initiates the communication process. The sender encodes the message. For example, a radio station broadcasting music is the sender. A student giving a presentation is also the sender.

Message: The information or content being conveyed. This could be spoken words, written text, an image, a signal, or anything else that can be transmitted. Think of a SMS text message, a poster about voting, or a hand signal from a traffic warden.

Encoding: The process of converting the message into a transmittable form. This could involve converting words into electrical signals, or designing a graphic symbol to represent a concept.

Medium (Channel): The means by which the message travels from the sender to the receiver. Examples include airwaves (for radio), wires (for telephone), the internet (for email), or even a physical poster.

Receiver: The person or entity that receives the message. The receiver decodes the message. Think of someone listening to the radio, reading a book, or viewing a public service announcement on television.

Decoding: The process of converting the message back into a form that the receiver can understand. This involves interpreting the signals, symbols, or words that were sent.

Feedback: The receiver's response to the message. Feedback indicates whether the message was received and understood. This can be a verbal reply, a written response, an action, or even a non-verbal cue like a nod of the head. If there is no feedback, the sender cannot be sure the message was successfully received.

Noise: Any interference that disrupts the communication process. This could be static on a radio, a distraction during a conversation, or poor image quality on a poster.

Example: A learner, Thandi, wants to ask her friend, Sipho, about homework.

Sender: Thandi Message: "Did you finish the Technology homework?" Encoding: Thandi uses spoken words (Zulu or English) to form her question.

Medium: Air (sound waves travel through the air)

Receiver: Sipho Decoding: Sipho hears and understands Thandi's question.

Feedback: Sipho replies, "Yes, I did. It was easy!" Noise: Other students talking loudly nearby might make it difficult for Sipho to hear Thandi clearly (noise). 2.2 Types of Communication: Verbal Communication: Using spoken or written words to convey a message.

Examples: a conversation, a letter, a news report.

Non-Verbal Communication: Using body language, facial expressions, gestures, and tone of voice to convey a message.

Examples: a smile, a frown, a hand gesture, a posture. Non-verbal cues can often support or contradict verbal messages.

Visual Communication: Using images, diagrams, symbols, and other visual aids to convey a message.

Examples: posters, infographics, road signs, logos, maps, charts. 2.3 Graphic Communication: Graphic communication uses visual elements to convey information. It's about designing and creating images that communicate effectively. Key aspects of graphic communication include: Clarity: The message should be easy to understand.

Simplicity: Avoid clutter and unnecessary details.

Visual Hierarchy: Guide the viewer's eye to the most important information. This can be achieved through size, color, contrast, and placement.

Legibility: Text should be easy to read (consider font choice, size, and spacing).

Color Theory: Understanding how different colors affect mood and convey meaning is important. For example, red is often associated with danger or urgency, while green is associated with safety or nature.

Symbolism: Using symbols that are widely understood to represent concepts.

Consistency: Maintain a consistent visual style to create a unified message.

Target Audience: Always consider the intended audience when designing a graphic. What are their needs, interests, and level of understanding?

Example 1: Road Signs: Road signs are a critical form of graphic communication. The shape, color, and symbols used are standardized to ensure drivers can quickly and easily understand the message, regardless of their language. For instance, a red octagon always means "STOP".

Example 2: Safety Signs: Safety signs in workplaces and public areas use graphic symbols and colors to warn people of potential hazards. A triangle with an exclamation mark indicates a general warning, while a circle with a diagonal line through a symbol indicates a prohibition (e.g., no smoking).

Example 3: Maps: Maps use symbols, lines, and colors to represent geographical features and locations. The map key explains what each symbol represents. Guided Practice (With Solutions)

Question 1: Identify the components of the communication system in the following scenario: A soccer coach uses a whistle (short sharp sound) to signal the players to stop their training drill.