# Lesson Notes By Weeks and Term - Senior Secondary 3

Revision of sectioning

TERM – 2ND TERM

WEEK ONE

Class: Senior Secondary School 3

Age: 17 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Technical Drawing

Topic: REVISION OF SECTIONING

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Define sectioning

II.) Identify the types of sections

III.) Draw sections of objects.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

 PRESENTATION TEACHER’S ACTIVITY STUDENT’S ACTIVITY STEP 1 INTRODUCTION The teacher do a recap on the topic sectioning and guide students to sketch all the sections use in sectioning. Students listens attentively to the teacher and participate actively. STEP 2 NOTE TAKING The teacher writes a summarized note on the board The students copy the note in their books

NOTE

REVISION OF SECTIONING

Sectioning is the process of dividing an object or a space into different parts or segments for various purposes such as analysis, organization, or presentation.

Types of sections

1. Offset Section: A section where the cutting plane is parallel to the object's axis but is offset from it, revealing internal features without cutting through the axis itself.
2. Revolved Section: This type of section is created by rotating the cutting plane around an axis of the object, typically used for cylindrical or symmetrical objects to show internal features.
3. Removed Section: In a removed section, a portion of the object is physically removed to expose internal features, commonly seen in mechanical drawings to clarify complex assemblies.
4. Broken Section: A broken section is a discontinuous cut through an object, used when it's necessary to show internal details without completely removing a section.
5. Half Section: The object is cut in half along a plane, revealing one half as a full section while leaving the other half intact, often used to show symmetrical objects more clearly.
6. Full Section: The object is cut completely along a plane, revealing all internal features, providing a comprehensive view of the object's interior.
7. Cut Plane Lines: These lines indicate where the cutting plane intersects with the object, helping to visualize the sectioning process and its location within the object.

To draw a section, there are certain graphical and design elements, the following should be considered.

1. Scale
2. Line weight
3. Textures
4. Labelling and dimensions

EVALUATION: 1. What is sectioning.

1. Identify the types of sections

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively