Lesson: A Center’s Lesson for 3rd Grade Geometry

Picture Pie by Ed Emberley

Shape Up! Fun with Triangles and other Polygons by David A. Adler If you were a Quadrilateral by Molly Blaisdell

I can break shapes into equal parts and describe the area.

I can recognize that a rhombus, rectangle, and a square are examples of quadrilaterals. I can see the similarities and differences between their attributes.

3.G1 Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g. quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.

3.G2 Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape.

- This lesson will be after the material is taught and it will be an extension and a check for understanding for the students.
- Students will be split up into partners and given a checklist of what they need to accomplish. Here is an example:

Kayla & Evin’s Checklist:

o 2D Shapes

o Comparing Quadrilaterals o Geoboard Fourths

o Congruent Eights

o Fractions with Color Tiles

Materials:

- Read aloud books
- Geoboards
- Rubber bands
- Scissors
- Copies of all papers located at this website: http://www.k-5mathteachingresources.com/3rd-grade-geometry.html
- Geoboard recording paper
- Color Tiles

Knowledge, Comprehension, Application, Analysis, Synthesis

Linguistic, Logical/ Mathematical, Spatial,Intrapersonal

Students will be able to share their results with the class. Ask for volunteers to share something interesting they discovered, or show how they got an answer in different ways.

K-5 Math Teaching Resources (http://www.k-5mathteachingresources.com/3rd-grade-geometry.html)

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