Biology as the Science of Life · SHS1 Biology

Lesson notes

Learning Objectives

Indicator: 1.1.1.LI.2 - Demonstrate the safe usage of the microscope to observe specimens.

By the end of the lesson, learners can:

Demonstrate the correct procedure for carrying, setting up, and storing a compound light microscope without damage to the instrument or injury to themselves.
Prepare a temporary mount of a simple specimen (for example, onion epidermis or a leaf peel) and place it securely on the stage of the microscope.
Focus the microscope correctly using the coarse and fine adjustment knobs to obtain a sharp, non-blurred image of a specimen.
Identify and record the image formed (including its orientation and apparent movement) and draw an accurate labelled diagram of what is observed.
Evaluate a series of unsafe or incorrect microscope practices and justify the correct alternative, showing extended critical thinking about why each rule exists.

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Curriculum details

Strand: Exploring Biology in Society (Strand 1)
Sub-strand: Biology as the Science of Life (1.1)
Content standard: 1.1.1.CS.4 - Demonstrate knowledge, skill, and safety in the use of the microscope. 1.1.1.LO.1 Explain the importance of Biology and its branches and relate this to everyday life. 1.1.1.LO.2 Solve everyday problems using the scientific method. 1.1.1.LO.3 Apply knowledge of body symmetry, orientation, and sectioning of various organisms, and make labelled drawings of specimens. 1.1.1.LO.4 Explain the safe ways of using the light microscope and the functions of its parts.
Indicator: 1.1.1.LI.2 - Demonstrate the safe usage of the microscope to observe specimens.
Suggested placement: Semester 1, Week 6 (Week 6 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. 30

Exemplars (from the NaCCA curriculum)

Experiential Learning Approach: in mixed-ability, task-based groups, learners mount different slides provided on the stage of the microscope and observe the specimen on the slide: Learner gains first-hand experience on lessons and relate to real world situations.
Differential Learning Approach: in mixed-ability groups, learners mount different slides on the stage and observe and discuss the images formed; learner develops the skill of critical observation and inquisition; learner improves speech ability through discussion.
Collaborative Learning: learners in mixed-ability groups exchange slides with different groups and examine other types of slides following the same procedure: Draw the images obtained at sharp focuses; learner works in team to develop team spirit.
Teaching and Learning Materials:
- * Microscopes * Slides
- * Source of light * Specimens
- * Sketch books * Pencils
- * Pens * Erasers.
Assessment (1.1.1.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 4 Extended critical thinking and reasoning.