Grade 1: Chapter 12 – Two-Dimensional Geometry

Chapter Essential Question: How do you sort and describe two-dimensional shapes?

Before
(Kindergarten) / Chapter Twelve Standards
Grade One / After
(Grade Two)
Identify and describe shapes (squares, circles, triangles, rectangles, hexagons, cubes, cones, cylinders and spheres).
K.G.2, K.G.3
Analyze, compare, create and compose shapes.
K.G.4, K.G.6 / Geometry 1: Distinguish between defining attributes (e.g. triangles are closed and three sided) versus non-defining attributes (e.g. color, orientation, overall size); build and draw shapes to possess defining attributes.
·  I can use defining attributes to sort shapes.
·  I can describe attributes of two-dimensional shapes. / Reason with shapes and their attributes.
2.G.1, 2.G.2, 2.G.3
Geometry 2: Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape.
·  I can use objects to compose new two-dimensional shapes.
·  I can compose a new shape by combining two-dimensional shapes.
·  I can make new shapes from composite two-dimensional shapes using the strategy act it out.
·  I can decompose combined shapes into shapes.
·  I can decompose two-dimensional shapes into parts.
Geometry 3: Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.
·  I can identify equal and unequal parts (or shares) in two-dimensional shapes.
·  I can partition circles and rectangles into two equal shares.
·  I can partition circles and rectangles into four equal shares.

Each day the math block will begin with 15 minutes of Daily Math Review and Mental Math. The focus of DMR should be either prerequisite standard skills or previous chapter concepts that were not mastered. The focus of mental math should be based on the current Chapter’s skills and concepts. Adjust the amount of questions in DMR and MM to fit into the 15 minute time block.

Suggested Chapter Pacing

All lessons are paced for one day, unless otherwise indicated. Teachers may adjust to meet students’ needs.

Launching the Chapter / Pre-Assessment / Review Prerequisite Skills
Find the Shape: TE 667I
Shape Pictures TE 667I / Show What You Know Assessment
TE 668
Identify Tier 2 and Tier 3 Groups for Small Group Instruction.
Day Before Lesson 12.1 / Vocabulary Activity
Define and describe Chapter Twelve vocabulary words. TE 669 / Vocabulary Builder
Guess the Word TE 670A
Identify students who will need further vocabulary support for Chapter Twelve. / Preview Chapter Centers
Introduce chapter games, activities, and literature students will be using during center time. / School – Home Letter
Read together and send home.
I Can Statement / Essential Question / Implementation Notes / Centers by Lesson / Teacher Notes
Lesson 12.1
G.1 / I can use defining attributes to sort shapes. / How can you use attributes to sort two-dimensional shapes? / A: More Alike Than Not
L: Signs Shape Up
G: On the Water / Click here to enter text.
12.1 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Undersea 3D – Level G
Shapes Ahoy: Sea Cave Sorting – Level K / Animated Math Model:
Sort and Classify Plane Figures
Lesson 12.2
G.1 / I can describe attributes of two-dimensional shapes. / What attributes can you use to describe two-dimensional shapes? / 2D Shapes, Glue, Pattern Blocks, Red and Blue Crayons / A: On the Corner
L: Signs Shape Up
G: On the Water / Click here to enter text.
12.2 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Ship Shapes – Level H
Shapes Ahoy: Ship Shapes – Level L
Shapes Ahoy: Undersea 3D – Level G / Animated Math Model:
Sort and Classify Plane Figures
Lesson 12.3
G.2 / I can use objects to compose new two-dimensional shapes. / How can you put two-dimensional shapes together to make new two-dimensional shapes? / Pattern Blocks / A: Building Blocks / Click here to enter text.
12.3 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Ship Shapes – Level K / Animated Math Model:
Combine Plane Figures
Lesson 12.4
G.2 / I can compose a new shape by combining two-dimensional shapes. / How can you combine two-dimensional shapes to make new shapes? / 2D Shapes / A: Building Blocks
G: On the Water / Click here to enter text.
12.4 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Ship Shapes – Level K / Animated Math Model:
Combine Plane Figures
Lesson 12.5
G.2 / I can make new shapes from composite two-dimensional shapes using the strategy act it out. / How can acting it out help you make new shapes from combined shapes? / 2D Shapes
Tape / Click here to enter text.
12.5 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Ship Shapes – Level K / Animated Math Model:
Combine Plane Figures
Lesson 12.6
G.2 / I can decompose combined shapes into shapes. / How can you find shapes in other shapes? / Pattern Blocks
Possible 2 day lesson / A: Building Blocks
L: Signs Shape Up
G: On the Water / Click here to enter text.
12.6 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Ship Shapes – Level K / Animated Math Model:
Combine Plane Figures
Lesson 12.7
G.2 / I can decompose two-dimensional shapes into parts. / How can you take apart two-dimensional shapes? / Orange and Purple Crayons / A: Building Blocks
G: On the Water / Click here to enter text.
12.7 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Ship Shapes – Level K / Animated Math Model:
Combine and Separate Plane Figures
I Can Statement / Essential Question / Implementation Notes / Centers by Lesson / Teacher Notes
Lesson 12.8
G.3 / I can identify equal and unequal parts (or shares) in two-dimensional shapes. / How can you identify equal and unequal parts in two-dimensional shapes? / A: Half Math
G: On the Water / Click here to enter text.
12.8 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Ship Shapes – Level Q / Animated Math Model:
Equal Parts
Lesson 12.9
G.3 / I can partition circles and rectangles into two equal shares. / How can a shape be separated into two equal shares? / A: Half Math
G: On the Water / Click here to enter text.
12.9 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Ship Shapes – Level Q / Animated Math Model:
Equal Parts
Lesson 12.10
G.3 / I can partition circles and rectangles into four equal shares. / How can a shape be separated into four equal shapes? / A: Half Math
G: On the Water / Click here to enter text.
12.10 Technology / Interactive Whiteboard Lesson / Interactive Student Edition (Engage) / Math on the Spot / Mega Math:
Shapes Ahoy: Ship Shapes – Level Q / Animated Math Model:
Equal Parts
Additional Resources for Chapter 12
Geometry 1 / Geometry 2 / Geometry 3
Amazing Attributes / Building Shapes / Teachers will use Go Math materials to teach this standard. If more practice is needed teams of teachers may find or create more experiences with this concept.
Attribute Blocks / What’s So Special About Triangles, Anyway?
Independent Practice
Properties Everywhere:

Des Moines Public Schools 2014-2015 Math Curriculum Guides Page | 2

Grade 1 – Chapter 12