Display the Math Practices page where all students can see it.
Gather 10 straws per student and some chenille stems or paper clips. (See Lesson 1 Materials Preparation.)
Gather centimeter rulers and a meterstick.
Gather a protractor for each student.
Organize a set of Power Polygons™ in an envelope for each student.
Students will need the following tools readily available for the Daily Practice and Problems items in this unit:
- Triangle Flash Cards: Square Numbers
(stored in an envelope) - calculators
- rulers
- protractors
- fraction circle pieces
- Division Facts I Know Charts (from Unit 7 Lesson 1 or Master in Lesson 1)
- Centimeter Grid Paper
- Fraction Chart (Student Guide) Reference
- Addition Strategies Menu (Student Guide) Reference
- Subtraction Strategies Menu (Student Guide) Reference
| LESSON | SESSIONS | DESCRIPTION | SUPPLIES |
|---|---|---|---|
LESSON 1Investigating Angles |
2 | Students investigate angles in several contexts, including angles that occur inside of shapes, in everyday objects, and in geometric representations. Students compare and order angles by size, eventually classifying them into categories of right, acute, and obtuse. |
|
LESSON 2Lines |
1 | Students are introduced to geometric concepts and vocabulary about lines and line segments. They use the terminology to talk about and solve problems. |
|
LESSON 3Turning Through Angles |
1–2 | Angles are modeled as the turning of a ray from a starting position to an ending position. Degree measure is introduced as a way to show the size of an angle. |
|
LESSON 4Measuring and Estimating Angles |
1–2 | Students estimate angle measures using benchmarks. They also measure and draw angles using protractors. |
|
LESSON 5Angles in Polygons |
3 | Students build upon their angle measurement and estimation skills by measuring the angles inside polygons and exploring the relationship between the angles in a triangle. They also begin to classify shapes, starting with the classification of triangles based on their angle measures. |
|
LESSON 6Workshop: Angles and Lines |
1 | Students practice the skills and concepts covered in Lessons 1–5. They practice identifying acute, obtuse, and right angles; drawing and naming lines, rays, and line segments; and estimating angle size using benchmark angles. They estimate, measure, and then find the sum of the measures of the angles meeting at a point (vertex) in tessellations. |
|
LESSON 7Symmetry |
1 | Students explore line (reflective) and turn (rotational) symmetry of polygons. |
|
LESSON 8Slides, Flips, and Turns |
2 | Students will investigate the transformations (slides, flips, and turns) of shapes. They will analyze, describe, and create quilt patterns and will describe how shapes move from one position, or orientation, to another. |
|
LESSON 9Describing and Analyzing Shapes |
1–2 | In Part 1, students play a game in which they find shapes with given properties. In Part 2, they use properties to analyze and describe shapes. To summarize the lesson, the class plays a game in which they name a property shared by a set of shapes. |
|
LESSON 10Classifying Shapes |
2–3 | In Part 1, students participate in activities in which they analyze, describe, and classify triangles. In Part 2, they complete similar activities with polygons. |
|
LESSON 11Workshop: Shapes and Properties |
1–2 | Students further develop their abilities to describe, analyze, and classify two-dimensional shapes by choosing targeted practice from a menu. Students also practice identifying congruent shapes, slides, flips, and turns of shapes. The story “Journey to Flatopia” provides a context for exploring two-dimensional shapes. |
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