Lesson Notes By Weeks and Term v5 - Grade 6

Lesson Video

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Performance objectives

• Define 'processing', 'product', and 'process' with South African examples.
• Identify criteria for evaluating a product (like safety and cost).
• Evaluate the efficiency and environmental impact of a process.
• Suggest improvements to a process.
• Compare two different processes for making the same product.

Lesson summary

Processing is how we change raw materials into useful products. This week, we're focusing on evaluating these products and the processes used to make them. This means we’ll be thinking critically about whether a product is good, safe, efficient, and meets our needs. In South Africa, understanding processing is crucial because we rely on it for everything from the food we eat (maize processing, canning fruit) to the clothes we wear (cotton processing) and the houses we live in (brick-making). Understanding how to evaluate products and processes empowers us to make informed choices as consumers and potential future producers, contributing to a sustainable and thriving South African economy.

Lesson notes

Processing: Processing refers to any action or series of actions that changes a raw material into a usable product. It involves transforming natural resources or components through various methods to create something new and useful. Examples in South Africa include turning maize into mielie-meal, sugarcane into sugar, clay into bricks, and wool into blankets.

Product: A product is the result of a processing activity. It is the final item that is made from the raw material. Examples are a loaf of bread, a brick, a shirt, or a tin of jam.

Process: A process is the specific series of steps or actions taken to convert a raw material into a product. It involves a sequence of operations, often using tools, equipment, and energy.

Evaluation Criteria: When we evaluate a product or process, we use specific criteria. These help us decide if something is good, efficient, or sustainable.

Important criteria include: Functionality: Does the product work as it is supposed to? Does it perform its intended purpose effectively? For example, does a school bag hold books and stationery without tearing?

Safety: Is the product or process safe for the user and the environment? Does it pose any risks of injury or pollution? For example, is a paraffin stove safe to use indoors?

Cost: How much does the product cost to make or buy? Is it affordable and good value for money? This also includes the cost of the process (energy, labour).

Durability: How long will the product last? Is it strong and resistant to damage? Will it break easily or require frequent repairs?

Environmental Impact: What is the effect of the product and the process on the environment? Does it use a lot of resources, create pollution, or generate waste? This is especially important in South Africa, where we need to protect our natural resources.

Efficiency: How well does the process use resources (time, energy, materials)? Does it produce a lot of waste or use too much energy? For example, sun-drying food is more efficient than using an electric dehydrator in terms of energy consumption, but it might take longer.