# Second Grade Math Unit 5 3-D and 2-D Shapes Objectives By the

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```					                          Second Grade Math
Unit 5: 3-D and 2-D Shapes

Objectives: By the end of this unit, the students will be able to:
Secure Goal:
 Identify 2-dimensional shapes
Developing Goals:
 Identify 3-dimensional shapes, such as rectangular prisms, cylinders,
pyramids, cones, and spheres
 Identify symmetrical figures
 Find common attributes of shapes
 Identify parallel and nonparallel line segments
 Draw line segments

Time Frame: 11 school days

Lesson 4.1 Exploring Rules, Directions, and Time
Obj. to identify rules and used to classify shapes; to give and follow directions;
and to tell time using digital and analog notation.
Vocabulary: none
 Mental Math (+ and -) and Math Message
 Math Message Follow-Up
 Whole Class Discussion (attributes)
 Students will work in math stations to explore these topics:
o Figuring Out Attribute Rules (math masters 74 and 75)
o Giving and Following Directions to make figures on a geoboard
o Making and Playing Clock Concentration
o Math Boxes/Math Facts

Lesson 5.2 Exploring Attributes, Triangles, and Sharing
Obj. to explore similarities and differences among attribute blocks and among
triangles; and to develop readiness for division
Vocabulary: none
 Mental Math (+ and -) and Math Message (attributes)
 Math Message Follow-Up
 Whole Class Activity (attributes)
 Students will work in math stations to explore these topics:
o Finding attribute blocks that differ by one attribute or more
o Investigating Shapes of Triangles
o Exploring Equal Sharing
o Play Shopping

Lesson 5.3 Exploring Polygons, Arrays, and Coins
Obj. to name and classify polygons; to develop readiness or multiplication; and to
find coin combinations equivalent to \$1.00.
Vocabulary: trapezoid, rhombus, polygon, side, vertex, angle, triangle, quadrangle,
pentagon, hexagon, heptagon, octagon
 Mental Math (multiples ) and Math Message (shapes)
 Math Message Follow-Up (shapes)
 Review characteristics o Polygons (Journal 116)
 Naming Polygons by Number of Their Sides or Angles (Journal 116)
 Students will work in math stations to explore these topics
o Constructing polygons on a geoboard
o Making Centimeter-Cube Arrays
o Making a Dollar
o Playing Dollar Rummy/Math Boxes

Lesson 5.4 Points and Line Segments
Obj. to define, name, and draw line segments
Vocabulary: point, straightedge, line segment, endpoint
 Mental Math ( number stories) and Math Message (points)
 Math Message Follow-Up (points)
 Whole Class Discussion (How Points are Named)
 Whole Class Activity (Defining and Naming Line Segments
 Drawing Line Segments with a Straightedge (Journal 118) Partners
 Play Clock Concentration
 Math Boxes

Lesson 5.5 Parallel Line Segments
Obj. to introduce the concept of parallel; and to apply this concept to parallel
lines segments
Vocabulary: parallel
 Mental Math (number stories) and Math Message (lines)
 Math Message Follow-Up (lines)
 Whole Class Discussion: Parallel Line Segments
 Drawing Line Segments That Are or Are Not Parallel (Journal 122 and 123)
 Partner Activity: Parallel lines on Geoboards
 Math Boxes

Obj. to identify the names and the characteristics of various quadrangles; and to
explore similarities and differences among quadrangles.
Vocabulary: square corner, square, rhombus, rectangle, trapezoid, parallelogram,
kite
 Mental Math (+ and -) and Math Message (shapes)
 Math Message Follow-Up
 Exploring Similarities and Differences among Quadrilaterals (Journal 120
and 123)
 Partner Activity: Making Shapes out of Triangles and Rectangles(Math
Masters 90 and 91)
 Extra: Tangrams and Play Touch and Match
 Shape Creations
 Math Boxes

Lesson 5.7 3-Dimensional Shapes
Obj. to compare and contrast the characteristics of 3-dimensional shapes
Vocabulary: cylinder, cone, sphere, curved surface, rectangular prism, cube,
pyramid, flat surface, face, edge, vertex
 Math Message (+ and -) and Math Message (shapes)
 Math Message Follow-Up
 Whole Class Discussion: Reviewing the Names of the Basic 3-Dimensional
Shapes (Journal page 126)
 Whole Class Discussion: Discussing Similarities and Differences among
Shapes
 Start a shape museum
 Independent Activity: Identifying Shapes of Real Objects (Journal p. 127)
 Independent Activity: Drawing and Counting Line Segments (Journal p. 128)
 Math Boxes

Lesson 5.8 Pyramids
Obj. to construct pyramids; and to explore the relationships among the number of
faces, edges, and vertices in pyramids
Vocabulary: base, apex, square pyramid, triangular pyramid, rectangular pyramid,
pentagonal pyramid, hexagonal pyramid
 Math Message (+ and -) and Math Message ( shapes )
 Math Message Follow-Up
 Activity: Constructing a Pyramid out of Straws
 Activity: Constructing 4 Kinds of Pyramids Out of Straws ( MM p. 94)
 Whole Class Discussion: Pyramid Constructions
 Enrichment: Construct a Decagon out of Triangles
 Math Boxes

Lesson 5.9 Line Symmetry
Obj. to find lines of symmetry in objects; and to complete drawings to create
symmetrical shapes
Vocabulary: line symmetry, line of symmetry, symmetrical
 Mental Math (+ and -) and Math Message (symmetry)
 Math Message Follow-Up
 Finding Lines of Symmetry (MM page 98 and 99)
 Completing Half-Pictures of Template Shapes (Journal p. 130)
 Line Signs
 Math Boxes

Lesson 5.10 Unit 5 Review
Obj. to review children’s progress on the material covered in Unit 5.
 Have students work in groups to review concepts taught
o Station 1: Parallel lines
 Practice on geoboards and chalkboards
o Station 2: Shape Attributes
 Attribute blocks and cards
o Station 3: 2-D and 3-D Shapes
 Concentration game
o Station 4: Symmetry
 eno board and laminated sheets
Homework: Unit 5 Study Guide

Lesson 4.10 (2) Unit 5 Test
Obj. Assess student’s progress on the material taught in Unit 5
 Review study guide that was completed for homework
 Discuss and difficulties or questions
 Unit 5 Test
 After test: make design with pattern blocks or Geometry Templates

Assessments:
 Unit 5 Test
 2-D Shape Creations
 Line Signs

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 views: 96 posted: 11/20/2011 language: English pages: 5