Classification of Materials · SHS3 Manufacturing…

Lesson notes

Learning Objectives

Indicator: 3.1.1.LI.2 - Explain the structure of semi-conductors as engineering materials.

By the end of the lesson, learners can:

Define a semiconductor and distinguish it from conductors and insulators using properties such as electrical conductivity.
Describe the atomic structure of a semiconductor as a crystalline material, including the arrangement of atoms and the role of valence electrons.
Explain the concepts of holes and free electrons as charge carriers in a semiconductor, using simple diagrams or models.
Differentiate between intrinsic (pure) and extrinsic (doped) semiconductors and state how doping alters conductivity.
Connect the structure of semiconductors to their function in everyday devices such as mobile phones, calculators and solar panels.

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Curriculum details

Strand: Manufacturing Materials and Technologies (Strand 1)
Sub-strand: Classification of Materials (1.1)
Content standard: 3.1.1.CS.1 - Demonstrate understanding in the use of advanced materials. 3.1.1.LO.1 Group and identify materials as advanced materials and discuss their applications in the manufacturing industry. 5 Gender Equality and Social Inclusion 6 Socio-Emotional Learning
Indicator: 3.1.1.LI.2 - Explain the structure of semi-conductors as engineering materials.
Suggested placement: Semester 1, Week 2 (Week 2 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 78

Exemplars (from the NaCCA curriculum)

Experiential Learning: Show learners semiconductor components such as microchips and transistors and let learners identify these components and the regular devices that use them such as phones, calculators, computers, solar panels, refrigerators, microwaves, television sets, radio sets, etc.
Talk for Learning: Learners discuss the structure of a semiconductor as a crystalline material with properties between a conductor and an insulator.
Teaching and Learning Materials:
- * Videos on the application of semiconductors
- Biomaterials
- Smart materials
- * Nanomaterials * Textbooks
- * Library resources * Internet access
- * Projector * Audio-visuals
Assessment (3.1.1.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning; Level 4 Extended critical thinking and reasoning.