G.1.2

Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles

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Formative Assessments
Formative Assessments
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Students are shown three triangles that fit a rule (each has a right angle) and are asked to determine which of three other triangles also fit the rule.
Grouping Triangles
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Students are asked to use shape descriptions to sketch shapes and explain why some cannot be sketched.
Sketching Quadrilaterals
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Students are asked to use shape descriptions to sketch shapes and explain why some cannot be sketched.
Sketching Triangles
Virtual/Hands-on Manipulatives
Virtual/Hands-on Manipulatives
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CPALMS: This extremely versatile manipulative can be used by learners of different grades. At early grades, this manipulative will help the students recognize, name, build, draw, and compare two-dimensional shapes.
Geoboard
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CPALMS: This online game challenges students to manipulate vertices to draw specific triangles in a discrete environment.
Triangle Classification Game
Assessment Questions
Assessment Questions
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Multiple Choice
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Multi Select 2
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Matching Item
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Open Response 1
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Multi Select 1
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Open Response 2
Videos of Expert Instruction
Videos of Expert Instruction
Use Real Link and Title
Use Real Link and Title
Use Real Link and Title
Hook/Performance Tasks
Hook/Performance Tasks
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The purpose of the task is to give 4th grade students a problem involving an unknown quantity that has a clear visual representation.
IM:  Finding an Unknown Angle
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The purpose of this task is for students to identify defining attributes of rectangles and parallelograms.
IM:  Defining Attributes of Rectangles and Parallelograms
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The purpose of this task is for students to measure angles and decide whether the triangles are right or not.
IM:  Are These Right?
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The purpose of this task is for students to articulate a definition for a trapezoid.
IM:   What is a Trapezoid?  Part 1
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Students use the definitions they are given for three types of quadrilaterals and what they know about parallel sides to identify that a square fits all the definitions and explain why.
IM:  What Shape Am I?