QCS 501 – Teaching PresentationLua Shixiong

Topic: Energy: LightSubtopic: Shadows

Presentation Outline

Literature review and Rationale

Overview of Teaching package

Q&A, feedbacks

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2

3

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Teaching Demonstration-Breaking the Magician’s code

Literature review and Rationale

Metacognition

Factual and Conceptual Knowledge

Prior Knowledge

5E

Factual and Conceptual Knowledge

Shadow

Facts

Donovan & Bransford, 2005

Prior Knowledge• Experiences with light, shadows, and darkness• Prior knowledge may lead them to

o simply not notice a phenomenao quickly dismiss conceptso not believe what they do not expect to see.

• Address preconceptions directlyo Reinforce correct factso Clarify misconceptions

Metacognition• Young children assume that things are as they appear. • Science is about questioning• Explanation is at the heart of scientific activity.• How can we facilitate Metacognition?

???

Teaching Package 1 (30min)

By the end of the lesson, a Primary 4 middle ability student will be able to recognize that a shadow is formed when light is completely blocked or partially blocked by an object.

Teaching Package 1• Watch a video about Hand shadows• Work on KWL chart• Talk about the phenomena they can explore by showing them materials and equipments to be used in the lessonEngage

KWL chart

What we know What we want to know

What we learned

What I still want to know

Teaching Package 1• How to cast shadows using cut outs made with different materials.Explore

A B C

D E F

Teaching Package 1Lead students to:1. Know the things are needed to cast shadows2. Describe the shadows that are casted 3. darker shadows are casted by objects that do not allow any light to pass through4. lighter shadows are casted by objects that allow some light to pass through them

Explain

Teaching Package 1• Complete the last two columns of the KWL chart • Add new facts into concept map for light and shadowsClosure

KWL chart

What we know What we want to know

What we learned

What I still want to know

Teaching Package 2 (60min)

By the end of the lesson, a Primary 4 middle ability student will learn to:

• investigate shapes and sizes of shadows by changing the position of the object and the light source.

• Recognize that an object can cast shadows of different sizes and shape.

• Review the KWL chart • Work on anticipation guide• Talk about the materials and equipments to be used in the lesson• Watch “Breaking the magician’s code”Engage

Teaching Package 2

Anticipation guide

Agree DisagreeShadows are alive The size of the shadow is based upon the size of the object.

• Work in groups to explore how the size of shadows can be changed by varying (1) the distance of the object and (2) light source with respect to the screen/surface.• Record the height of the shadow, distance of Lego figure to the screen, distance of light source to the screen.• Students will key in their data into Google Docs (Assuming that the classroom is equipped with internet connection and 2 computer pushcarts containing 20 laptops each. The student to laptop ratio is 1:1. )Explore

Teaching Package 2

• Guide students to analyze the data they have collected.Explain

Teaching Package 2

Lead students to conclude that:1. The size of shadows changes as you change the position of the object or the light source2. When the position of the light source is fixed, the shadow will become bigger if the OBJECT is nearer the light source3. When the position of the object is fixed, the shadow will become bigger if the Light source is nearer the object

Demonstration

• Imagine this, the Lego is standing 30cm away from the screen. And you move 10cm forward to the 20cm mark. From 1, you would expect your shadow to be smaller. But by moving the light source forward to the 70cm mark from 100cm, you can have the same shadow with the same size !

Extend

Teaching Package 2

Write in your journal, how the magician is able to perform the magic trick.

Support your answers using the data which we have collected.

Teaching Package 2• Review anticipation guide• Complete the last two columns of the modified KWL chart • Add new facts into concept map for light and shadowsClosure

Have fun !Thank you