Attributes of 2D Shapes
Distinguishing between defining attributes (e.g., number of sides, vertices) and non-defining attributes (e.g., color, size, orientation) of 2D shapes.
Key Questions
- Justify why we categorize shapes based on their corners and sides instead of their size or color.
- Compare a square and a rhombus; what are their defining attributes?
- Analyze how changing the orientation of a shape does not change its name.
Ontario Curriculum Expectations
About This Topic
Investigating Light explores how light behaves when it hits different objects. Students learn that light travels in straight lines and can be blocked, reflected, or passed through. The Ontario curriculum focuses on classifying materials as transparent, translucent, or opaque. This topic is essential for understanding how we see and how technology, like mirrors and windows, works in our daily lives.
Students also explore the creation of shadows and how their size and shape can be manipulated. This topic is highly experimental and thrives in a 'darkened' classroom environment where light sources become the focus. Students grasp this concept faster through hands-on modeling where they can move light sources to see immediate changes in shadows.
Active Learning Ideas
Stations Rotation: Light Pass-Through
Students visit stations with flashlights and various objects (wax paper, cardboard, clear plastic, a mirror). They sort the objects into three bins based on whether the light goes all the way through, some through, or none through.
Simulation Game: Shadow Puppets
In pairs, students use a light source and their hands to create shadows on a screen. They experiment with moving their hands closer to and further from the light to see how the shadow's size changes.
Inquiry Circle: Mirror Maze
Groups try to 'bounce' a beam of light from a flashlight off a series of small mirrors to hit a target on the wall. This helps them visualize that light travels in straight lines and can be reflected.
Watch Out for These Misconceptions
Common MisconceptionShadows are 'things' that come out of objects.
What to Teach Instead
Students often think a shadow is a physical part of the object. Active modeling with flashlights helps them see that a shadow is actually just the *absence* of light where an object blocked its path.
Common MisconceptionLight only travels as far as we can see it on the floor.
What to Teach Instead
Children often think light 'stops.' Using a dusty chalkboard eraser or a little fog in a jar can help students see the beam of light traveling through the air, proving it continues until it hits something.
Suggested Methodologies
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Frequently Asked Questions
How can active learning help students understand the properties of light?
What are the best materials for teaching transparent, translucent, and opaque?
How do I explain reflection to a 6-year-old?
Can we do light experiments without a dark room?
Planning templates for Mathematics
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerMath Unit
Plan a multi-week math unit with conceptual coherence: from building number sense and procedural fluency to applying skills in context and developing mathematical reasoning across a connected sequence of lessons.
rubricMath Rubric
Build a math rubric that assesses problem-solving, mathematical reasoning, and communication alongside procedural accuracy, giving students feedback on how they think, not just whether they got the right answer.
More in Geometry and Spatial Reasoning
Identifying 2D Shapes
Recognizing and naming common two-dimensional shapes (squares, circles, triangles, rectangles, hexagons).
2 methodologies
Identifying 3D Shapes
Recognizing and naming common three-dimensional shapes (cubes, cones, cylinders, spheres, rectangular prisms).
2 methodologies
Attributes of 3D Shapes
Distinguishing between defining attributes (e.g., faces, edges, vertices) and non-defining attributes of 3D shapes.
2 methodologies
Composing 2D Shapes
Combining smaller shapes to create new composite shapes (e.g., two triangles make a rectangle).
2 methodologies
Decomposing Shapes into Parts
Identifying parts of a whole by decomposing shapes into smaller, simpler shapes.
2 methodologies