Lesson Notes By Weeks and Term v4 - JHS 2

Lesson Video

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Performance objectives

• Identify tools used for joining and assembling.
• Demonstrate correct use of different joining techniques.
• Explain the importance of selecting the right tools.
• Assemble a simple project.

Lesson summary

This lesson introduces the fundamental skills of joining and assembling materials. In our daily lives in Ghana, almost everything we use is made of parts that have been joined together. From the wooden desk you sit at and the metal gate at the school's entrance to the school uniform you wear and the roof on our homes, joining processes are everywhere. Understanding how to join materials correctly, safely, and with the right tools is a critical skill for design, construction, repairs, and creativity. This lesson will equip you with the practical knowledge to assemble your own projects and understand how the world around you is built.

Lesson notes

A. What are Joining and Assembling? Joining: The process of permanently or temporarily connecting two or more pieces of a material together. Assembling: The process of putting together various joined parts to create a final product. For example, you *join* two pieces of wood to make the leg of a table. You then *assemble* the four legs, the apron, and the tabletop to make the complete table. B. Types of Joints

Joints can be classified into two main categories based on whether they can be taken apart easily. Temporary Joints: These are joints that can be disassembled without damaging the components or the fastener. They are useful for products that may need repairs, inspection, or replacement of parts. Examples: Using screws, bolts and nuts. A hinge on a chop box is joined with screws so it can be replaced if it gets damaged. Permanent Joints: These are joints that cannot be disassembled without destroying the components or the fastener. They are used when a very strong and lasting connection is needed. Examples: Using glue (adhesives), nails, rivets, or welding. The wooden frame of a chair is often glued and nailed for maximum strength. C. Common Joining Methods, Tools, and Materials

We will focus on the most common methods used for wood and metal in a school workshop. Joining Wood

a) Mechanical Fastening (Using Fasteners)